The shoulders aren't a bit too unbroad, you don't think? Those shoulders look even unbroader than normal shoulders, but considering the amount of muscle on this woman, I think you'd need to widen them even a bit more than normal.
I simply LOVE your Wonder Woman. Generally I find that when I see art of her, even in the DC comics or cartoons, they always seem to draw her too tough/burly or not as pretty... >w< The prettiest I've seen her ever was straight-to-movie DC animated movies, but she was drawn too burly and it bugged me, but in Justice League well, she's not AS burly but not as pretty either. Anyways, I simply LOVE how your Wonder Woman is not only tough but the prettiest I've ever seen her!! <3 (DC should totally hire you, man, I mean it. You NEED to do Wonder Woman's art. x'3) Anyways, Wonder Woman is a symbol of both power and beauty... basically, she's all woman!! x'3 Anyways, she's beautiful, sure, but finding the muscle balance can be hard, because her muscle is noticable but if you go even slightly overboard with tweaking the muscles then it looks kinda... physically awkward... >w< I guess... but that's just my opinion and personal taste.