Thing about the cape is, it might be incredibly stupid for fighting crime in, but at least you can wear it around, you know? It's not going to impede you walking much unless it's a really windy day, and even if it gets tangled you aren't going to wind up flashing the whole street. You can dress like Superman or Batman. People do all the time. Wonder Woman... well, you can, but you're gonna be keeping your top up with double-sided tape and prayer, and it had better be warm out. And you'd better be old enough to pull it off. Baby fangirls too young for cleavage and heels who want to dress up as a well-known heroine aren't exactly spoiled for choice. I'm not voting for jeans on everyone, but more tights would be nice.
Also, shoulder straps on Wonder Woman's outfit. I wouldn't have to wince reflexively every time she moves, but her costume wouldn't look any less gloriously deranged, either, so we all win!