I say juvenile, but perhaps "unsophisticated" would be a more accurate term. He dresses a character in a uniform that is utterly unsuited for the role their supposed to fill, and the only reason is because he thinks it's more attractive that way. That doesn't strike me as a practical reason to make the decision, but more than that it seems... degrading. Degrading because the character is forced to dress in an upsurd outfit in an upsurd situation just so her fans can drool over her. I personally just find it kind of gross.
I agree with you, however, that I can't judge the game or the character too harshly because, well, it hasn't been released yet. Until then I can't say much more beyond speculation, so personality wise she may be the most fascinating character in history.
As for asking women to dress that way, even as a request, that does seem sort of pervy. A pervert being someone whose sexual desires or actions fall outside social norms, publicly suggesting that women dress up as bikini snipers falls out of social norms. It could all be a misunderstanding, but the way everything was presented, it really makes it sound like he designed a character he found attractive for the sole purpose of seeing women dress that way. It comes across as fetishistic and strange, though again, it may be a misunderstanding.
I've been debating this with like three different people though, so I think I'm just going to leave it here, and say we can agree to disagree. Lets all agree Anita Sarkeesian is awful, or that terrorism is bad or something so we can all get along again, eh? :,