I think the first thing I noticed about this costume is the giant platform heels. One of my favorite elements of the Iron Man 2 costume was Natasha’s flats, vaguely reminiscent of ballet shoes. Practical-ish and character appropriate. I’m hoping these are just part of some movie magic to make Ms. Johansson look taller, and not the final look. Because these boots were not made for crimefighting, and I’m not too fond of platform boots as civilian wear.
Actually, she had the same wedge heels for Iron Man 2. What you’re seeing is a mistake that they never took the time to fix. Any time in the film, you see the wedge heels except this scene where she’s clearly in flats to fight. Just a blooper.
But I agree. I prefer the practical flats as well.