Some uniform basics that are league wide:
1. I'd get rid of the free for all of alternate uniforms. Go with standard dark home and white away uniforms (aside from hot weather white at home exceptions). I'd give each team a dark and white throwback option, and all teams wear throwbacks once a year on Thanksgiving. For a few teams I'd give them fauxback exceptions instead of true throwbacks when needed.
2. The large college style chest wordmarks don't look right, but I do like the small wordmarks below the collar, these are being added to all the teams.
3. No logos on the back collar of jerseys, that's a bad trend, if you want to put a maker's mark somewhere maybe put it there.
Arizona Cardinals:
I changed it up to something simple and traditional, using their stripe pattern from their St Louis years' white jersey, with a custom number font. Their white throwback is just going back to the design used in 1996 with the Arizona flag. The dark throwback is a modification of the 1925 championship season, to meet modern uniform specs, sort of like what they did for the 75th season throwbacks.
Atlanta Falcons:
I was a big fan of their original red helmet / black jersey style, so I switched back to that look from the late 1960s, but kept the current logo. Tried to match up the helmet and pants stripes in one design, and the sleeve and sock stripes in another. Going with red helmets full time makes the 1990s era black on black good throwback alternates.
Baltimore Ravens:
My main change is with the pants, just set a standard with black pants all the time, adding in a stripe pattern, and contrasting purple socks. Also change the custom numbers closer to a block font. For throwbacks a white over white similar to their early seasons in Baltimore that featured the trademark disputed original crest logo on the helmet, but using the current crest instead. Meanwhile going with an all black homage to the all whites of the 1970 champion Baltimore Colts.
Buffalo Bills:
I think the Bills look much more recognizable with their reds helmets. Created a slightly customized font, and tried to make their stripe pattern uniform across the helmet, jersey, and pants. Going red helmets full time makes the white standing buffalo helmet even better as the throwback, using the UCLA stripe design from the early 1960s to change things up a little more from the current jersey design. Keeping the modern buffalo on a white helmet for the blue throwback, the 1974 design when the modern logo first debuted.
Carolina Panthers:
For Carolina that custom blue just looks great, so I made that the primary color, and ditched the silver completely. The jersey drops the logos and instead changes up their existing shoulder stripes to a traditional UCLA stripe design. The throwback is obvious, going with the original logo and design for both dark and white alternates.
Chicago Bears:
One of the few classics left in the league not needing any changes. Using their 1936 and 1941 designs as the alternates.
Cincinnati Bengals:
I have never been a fan of their tiger stripe helmet, it is just too much for me. Plus they have a great tiger head logo they hardly use that would be perfect on the helmet. This uniform design is a modified version of the 2004 set, using orange as their primary color. For their throwback options I went back to their original tiger stripe helmet design.
Cleveland Browns:
Jerseys stay the same mostly as their classic design, just going with their rounder number font, and adding in the brown helmet numbers. Bringing back the brown pants on the road but adding in some stripes. Changing up the shade of orange to the older hue. Also I'd make Brownie the Elf their official logo instead of just a helmet. For the throwback, their original uniform from 1946 with white helmets and drop shadow numbers, updated making the stripes uniform throughout, and a brown facemask. The dark alternate using orange pants and standard block font, and slightly different stripe pattern from the 1970s.
Dallas Cowboys:
They should start wearing their navy jerseys at home. Dropped the stars on the sleeves so their navy jersey matches the white, only difference being a small silver outline on the stripes. As far the their mismatched colors, dropping royal blue and standard silver, and instead using navy and the bluish silver throughout, including the helmets. The white helmet designs from their first season are great for the throwback uniforms.
Denver Broncos:
Simple here, go back to something very similar to their classic 1980s orange crush design. Differences with the orange numbers on the road jersey, orange belt, new stripe pattern, and also an updated version of the D logo, based on a design from Football as Football. For the alternates I used their whites from 1966 and though by no means good looking, the navy design is a Superbowl champion set.
Detroit Lions:
The recent update with the racing stripes is nice, mostly just adding in pants stripes and a custom number font. The plain blue and silver Thanksgiving throwback is a nice look, along with a blue helmet with a white jersey design they wore in the preseason in 1954.
Green Bay Packers:
One of the few classics left. For the throwbacks the championship seasons of 1936 and 1944 work great.
Houston Texans:
The original design was simple and a modern classic, but going with red jersey and navy helmet, as navy on navy is too similar to the Bears' look. Switching to a red facemask on the helmet, and switching up the stripe pattern on the red road pants. Their never used original white helmet with the navy jersey works well for a dark alternate/throwback. I think the Titans could somehow share the Oilers history with Houston. The Texans could wear a modified version of the Houston Oilers' inaugural and AFL championship 1960 season set, but rather than an Oilers logo, a modified version of their new H logo, a Texas chest patch, and their custom number font.
Indianapolis Colts:
A classic with not much to change, just going back the blue facemask and striped socks. With such a consistent, classic look, especially since they have been in Indianapolis, not many options for a throwback. The 1950s designs with the small back of the helmet horseshoes, both the white helmet with a blue jersey, and blue helmet with white jersey, work as their throwbacks. Different enough but still a classic style and obviously the Colts.
Jacksonville Jaguars:
Making teal as the obvious primary color and gold as secondary, with black just used for trim. The gold helmet is biggest change, a chrome gold like Notre Dame would be great. Kept the design pretty minimalist and similar to the original design. Also created an updated full body jaguar logo for the sleeves. For the throwbacks the 2004 set when they switched the numbers on the white jersey to black. But instead using white pants for both the black and white uniforms.
Kansas City Chiefs:
A classic look, no real changes needed, just moving a modified Lamar Hunt/AFL memorial to the sleeve. A consistent looking team, even their days as the Dallas Texans look pretty much the same. I used the interlocking KC in white for the helmet logo swapping out the Texas logo their original Dallas Texans home and away sets.
Las Vegas Raiders:
Raiders have an absolute classic already, no need to make changes. For the throwback you have to go back to their first years in the early 1960s for something different than the silver and black classic. Sort of a mashup of styles from their first few years. I went with their first silver helmet and white jersey design from 1963, mixed in with a modified version of the white pants and stripped socks they wore that preseason, swapping out the gold trim for silver. Similarly the 1963 preseason black jersey but color swapping gold for silver and white, and paired with the silver helmet.
Los Angeles Rams:
I like their navy and gold design from the St Louis days, but think the bright blue and yellow works better than navy and gold, so swap the colors and I think it’s a great look. The 1951 championship season yellow throwback with navy helmet is a good alternate look, as well as the 1960s white horn design.
Miami Dolphins:
I’d go back to their last 90's era logo, but dropping the navy elements, and using the 80's era aqua and orange. I really don’t have a problem with their current number font or emphasis on white in the uniform, so that’s reflected here. I’d also keep their previous wordmark over the new one, which is very bland, and return their helmet, sleeve, and pants stripe design to the previous look as well. Obviously going with undefeated 1972 season white throwbacks, even if they are pretty similar to the primary design. For the dark alternate using the 1973 championship season with the orange stripe socks.
Minnesota Vikings:
Their new uniforms in 2013 are a big upgrade over previous designs. I’d ditch the odd looking number fonts though, and make a few slight changes to the striping, but it still works. Throw in some yellow outlines for the numbers. Also make sure the purple in the helmets match the purple in the rest of the uniform. For the alternates going with the throwback dark and white uniforms from the purple people eater days of the 1970s.
New England Patriots:
Their current navy is so bland and boring. I'd go back to their old red jersey design, but keep the silver pants and helmet. And they are the Patriots, have to go red, white, and blue, instead of navy. Also modernize the collar and go with a similar number style to the Bledsoe era uniforms. For the throwbacks going to the classic Pat Patriot solid white look and you have to retain their dominant Brady era navy set as the dark throwback.
New Orleans Saints:
Go back to the old gold color and use that on the helmet and pants, swapping out the sleeve logo for some stripes, and making the pants stripes match the helmet, as well as gold numbers on the white jersey. They've had a fairly consistent design, so the white pants look from the 1975 season is the best choice for something different. The white alternate using a black helmet from the preseason of 1969 and both throwbacks add the Louisiana alternate logo as a chest patch.
New York Giants:
Pretty good look, but a few changes. For a team who is called big blue, and clearly has blue as their primary color, why is their white/road jersey using solid red numbers and stripes? Switch that to blue and it looks much better. For their alternates I went with their red 1938 and white 1990 championship season looks.
New York Jets:
I tried mixing their logo and look from the 1960s with the winged version of the 1980s. Keeping the white helmet design, just going to a more standard sleeve stripe set but incorporating the jet fin into the stripe. A little lighter shade of green in there too. The 1968 season championship design is the obvious choice for the throwback, and then the green helmet over white jersey of the 1980s.
Philadelphia Eagles:
Always preferred the old kelly green, so going back to that but keeping a lot of the design elements of the modern look. Making silver much more prominent, also simplifying the numbers to old block style and updating the font. Alternates throw back to their 2017 midnight green championship season as well as the all white design from the early 1970s.
Pittsburgh Steelers:
A great uniform, just a couple of minor things to fix; the jersey numbers need to go back to a traditional block font, and dump the chest patch logo in favor of a wordmark. The 1962 yellow helmet and white pants look is a good throwback, the year they first added the Steel logo to the helmet.
San Diego Chargers:
I'd keep the Chargers where they belong in San Diego, I am sure between SDSU, and a possible soccer team you could have gotten an NFL stadium there if Spanos really wanted to stay. Going with powder blue full time, with the classic color blocked stripe with lightning on the shoulders, and color block for the lighting on the pants too. Keeping the original lighting bolt design rather than the new flatter version. For the throwbacks bringing in the yellow pants, ended up doing the 1967 design the first time they wore navy, and the navy and royal blue mix up that debuted in 1979 for the white throwback.
San Francisco 49ers:
Mostly just switching the the red facemask and brining back stripes to the socks. For the throwbacks, using the fauxback design they have now, but since the design it was based on in 1955 had a plain red helmet, using a plain gold helmet instead.
Seattle Seahawks:
Ditching the all navy look, going with the gray pants with both dark and light jerseys. Thought the logo and uniform could focus more on the bright green a little more. I'm not a fan of all the weird stripes they've got going on the chest, and especially not the word mark on side instead of the center, asymmetry in uniforms drives me nuts. So cut out all weird stripes, and go with a more traditional look, since their classic look was classic for a reason. The alternates an obvious choice to throwback to the classic blue and silver design from the 1980s and 1990s, and then using their 2013 championship season design.
Tampa Bay Buccaneers:
It was good that the Bucs pretty much returned to their Superbowl winning pewter design, but still not the best option. There is something about the old orange look they had that I just think is better for a warm weather Florida team. Really the 90s era design with the orange and white would work, but this logo from Torch Creative is simply a perfect blend of both Bucs eras. So I used a slightly modified version of that as the primary. While the original creamsicles with Bucco Bruce are a nice throwback, they are very similar to the main design, so going with the original pewter look from their Superbowl XXXVII championship season.
Tennessee Titans:
Not a fan of the flaming part of the logo so I simplified to a circle. Tried to do something more traditional with their uniforms, basically modifying the design of the last set the Oilers wore, using the Titans color scheme. Same stripes pattern, etc from that set. Also really needed an updated wordmark. The all white version of their original look as the Titans as the white throwback, and then returning the light blue Oilers uniform, but swapping out the Oilers logo for a modified Titans logo on the helmet.
Washington Commanders:
The uniforms and logo since they switched to the Commies are awful. I do like their idea of incorporating the Washington city flag into the design, so I worked the stripe pattern and three stars into their logo and uniform. The W, stars, and stripes into a military like roundel. Going with the yellow pants full time. For the alternates I used spearhead design from 1960's. The uniform they wore for all 3 of their Superbowls in the 1980's and 90's with the burgundy pants works here, only difference is it has a Commanders W logo in the style of the helmet logo from that era.