im all about more diverse body types for female characters in this game. a lot of people say rek'sai
is a good example of this but honestly she really isn't at all. she's a woman only in the context of her voice being a higher tone then what you imagine a male version of her would sound like. if you need to remind players that this character is a female then she's probably not very good female representation.
i think 2 really good examples for plus sized female representation are
Zephyr
http://www.comicbookreligion.com/img/z/e/Zephyr_Faith_Herbert_2.jpg
a legitimately fat woman who has super powers that don't have to just do with her weight (arguably some say she's a literal blimp but the story i read shows she very much overweight before she becomes a super power, implying that it's actual fat and not some weird hot air super power)
and brienne of tarth
http://static.comicvine.com/uploads/original/11/117031/3660017-brienne.jpg
still a woman obviously but she's a warrior and she's strong and durable as any fighter should be (remember female fighters don't have to be dexterity based) these 2 me are good examples of non sexualized or idealized female characters and function fine as good representation for girls who have a little bit in the tums.
im all for more diverse body types in women. kalista was an okay start, but we could do better and hopefully have a character who is X and is Y and not X because of Y or X despite of Y (does this make sense)
and too the folks saying "i don't want it in my games" or "i wouldn't play it" that's the cool thing about league, there's over 100 characters so you won't ever have too, i don't ever play hyper feminine characters simply because i don't see myself represented in them and they don't fulfill my in game fantasy. but i bet there's plenty of people in our player base who would love or need this kind of representation.
TL:DR -more body types in league pls, particularly for the women since they're lacking in that department. don't let your fat girl characters be walking fat jokes like we've let gragas become (no angry redneck ullga skin pls) female characters are strong when they're strong and they're feminine, not when they're strong because they're women or despite being women.