I agree that some accents on the flying Jets script would be good. Silver and/or black, I agree (the '90s had black accents, but just trim and facemasks). Our current unis are slightly updated from the '60s unis anyway (darker green, green facemasks instead of gray, round symbol instead of football-shaped). I also agree that the shadow under the numbers were absolutely horrid (the '90s 49ers and Dolphins for example... ugh!) so I wouldn't want that. Looks like nobody does because we haven't seen them in years. Not crazy about the swooping swoosh things that some teams have either. Adjustment of stripes and some trim would work, IMO.
And I agree that the Titans clothing for fans is nice, but for the team it's awful. I don't know how many times I was watching the Jets and someone asked me, "Aren't the Jets on? Why aren't you watching them?"
Some teams have multiple unis. How many are allowed by the league per team?