If you're making changes to the costume because you're afraid something more accurate to the comics would look silly in live action, make sure that what you change it to doesn't look silly anyway.

If they had taken the wings off of his helmet and it ended up looking cool, I'd be all for it. But the helmet looks goofy as it is, and I don't think wings would have made it any goofier. It's interesting to note that in most of the concept and production art of this film, Cap has his ears exposed... I have to assume that was the original design, but they couldn't pull it off in reality. Maybe the actor's ears are too close to his head, or stuck out funny or something when they tried it.

What I'm most surprised at is that in all of these films about masked heroes, they always seem to want to make a real mask/helmet/cowl for them. I don't understand why they don't use prosthetics more. When they can make an actor into an old version of himself, or allow one actor to play multiple roles, or have them all burnt and disfigured or turn them into a demon or whatever, there's literally no reason I can think of that they couldn't sculpt the exact look for a masked hero straight out of a comic book that they want. Give the actor a bit more of a lantern jaw... perfect the shape of his head, whatever. Admittedly, it would be rougher on the actor by requiring a long time in make-up, but then in these films they only wear masks for something like 30% of their time on screen, so they can tough it out.