The complaints about her being cast so far seem pretty shallow and entirely cosmetic-based.
Unless they're putting her in a bikini, the complaints about her bust size should be totally irrelevant. If they want to give her a bigger bust size, you really think that would be difficult to do? Ignore that part of it. Prosthetics and costumes can handle that.
You guys are complaining about her frame? Why? Although they've started principal photography, the movie doesn't come out until
July 2015. My guess is that WW's part won't be a big one and filming her scenes might not even occur until late Spring time 2013 if I were to take a guess.
When a lot of these actors/actresses who have gone on to play superheroes, most of them were far from looking big, muscular, or buff once casting was announced. There have been way too many examples of this for me to list but we all know how this goes. We've seen that if you give any of these actors a good 4 months of rigorous training, they'll be able to transform their bodies with stunning results.
Gadot is most likely already in the gym as we speak as did Ben Affleck did just days after his announcement was made.
So for me, the cosmetic/physical stuff isn't going to be an issue whatsoever. We need to be worrying more about the writing/direction/performance of the character more than anything else.