How is lux or fiora oversexualized? Sivir was made too look a little like xena, so her armor does as well. zyra is a poison ivy type charecter so she would flaunt like poison ivy. akali has side boob in on her original skin, and she has a sexy nurse skin, she has plenty of skins that cover her up. Vayne has a valentines day skin(of course vday would be sexy) other than that shes verywell coverd and doesnt flaunt anything
The game is about entertainment, look at movies, look at magazines (esp the magazines for women, some of those are basically playboys) This is our culture now, and this game does it alot less than most.
Will the sexy skin sell alot? yes, so it will be made to make money.
Have you seen many women play games? most i play with only use attractive females and never the ugly ones, maybe they have themselves to blame for this as well. 7 women i knew played wow, all were night elves and blood elves, no orcs, no trolls (if i met an actual female playing a troll they only used the one face that wasn't hideous) some didn't even use humans cause they said they looked fat.
Women go after the attractive women just as much, if not more so than men, therefor it sells to both genders better being attractive. From a business standpoint you would be crazy not to put a little sexiness in there for these reasons