I'm not exactly sure how you get to "Tits n ass" from someone like Vi. Or Diana. Or Fiora. Nami's debatable - I don't think she is, but can understand why others do.
I could easily keep this up though, next 4 champions is a 50/50 split as well, with Shyvana/Riven and Sejuani/Ahri.
People need to stop saying Riot released nothing but tits n ass when it is blatantly false. Annie remake had people up the same "zomg, she's gonna be a pervy teen now". They even removed her panties. And not in the way you'd expect from a sex-driven company.
It's sheer non-sense and I am getting fed up of people repeating it like a mantra.