...or lets make some female champions with realistic armor and proportions.
Vi is also only perverted in her login animation, where her boobs bounce for no reason. Her artwork on its own is, for the most part, decent. Akali's clothes are not decent, but her actual splash art pretty much is; it's from the front, it's not really revealing, and the pose is serious. Sejuani pushes it slightly more, but it doesn't seem that bad either.
My point is that, while there is definitely a lot of sexualization of female characters in League, there are plenty of exceptions. Quite a lot. People do absolutely overplay this "problem". And it really is only a problem according to demographics. As it stands, the majority of people who play League are male, so mostly the game is going to cater to males if it's going to have fanservice.
I wouldn't mind some fanservice for girls at all, since yeah, it would be fair. But as a heterosexual male, I don't really care to see it either. And if the game had no fanservice at all, I'd still be playing it, because I'm not playing the game for fanservice.