I liked the Avengers suit a lot, but I can agree with those complaints about the helmet. It needed those exposed ears like the TWS suit (which is just fantastic all around). If we could get a hybrid between the two suits (like the build of the TWS suit with colors/design elements closer the TA one) then that would probably be my new favorite.
What I'm most looking forward to with Cap in AoS is his dynamic with the group now that his leadership role has pretty much been established. Since the team has already been forced to get over their differences and come together in the first one, I imagine Cap's role within the group will finally be as it usually is in the comics (in which most of the stories have a well-established Cap calling the shots in modern times), and that excites me. It looks like he basically is that guy in TWS, but it'll be particularly fun to see it in the context of the Avengers team, imo.