Most of the pics re costume design that people are putting forward are still based on the traditional costume, with the corset and 'shorts' (and I don't think they can count as shorts!)
There were differences with the Superman costume of course but it wasn't a HUGE step away from the original IMO, aside the missing trunks.
I think, if they are carrying on with the more realistic, modern element from MoS (which I assume they will be) they need to design a costume which makes WW look incredible, but is also BELIEVABLE as a superhero costume.
If a woman is going to battle, is she really going to be wearing a push up corset and knickers??
Her obvious beauty and sexuality is important for WW, not disputing that, and the fact that her costume is marginally revealing would work, I think (you could have enemies literally dumbstruck by her wonder assets etc...) I just don't think it should look like she is wandering around half-dressed.