I think I would actually kinda love having Cap with a full-on Cap suit, sans the helmet if they can't get it right. He looks like much more of a badass in both TFA and TA without it.
But I still feel like they can get that cowl right if they keep working at it. 3D wings wouldn't be exceptionally hard to do if you ask me, just make them stylized triangular little metal pieces as opposed to full-on wings, similar to Bucky Cap:
Also, make the suit itself feel more uniform-like, rather than something that feels more like a mock-up. I'm reluctant to use the word "armor" but some kind of a lightly padded, properly textured modern armor that takes on the shape of the classic costume (even with some "Super Soldier" elements thrown in like the circled star emblem) could be great.