I wasn't happy with Cap's uniform in the Avengers movie either, it feels like he is wearing PJ's. I agree the costume comes across a little better on the figure.
I always tell myself though when watching the movie that this isn't the uniform Cap would have picked for himself. It wasn't designed by him and he embraced it only as he was thrust into a crisis. Cap had a say in his WWII uniform (not the star spangled one, but the one he actually battled in) and I think what we see when we get too AoU is Cap having a say in a Captain America uniform again. He probably had a say in the Strike suit too, but after embracing the Red White and Blue at the end of WS and distancing himself from Shield, AOU Cap/CW Cap is the version of Cap that I think best represent the character in the MCU; and I suspect from the story Cap would have thought so too.