Considering the issues the anime industry had with "Lolis" and what the word is associated with. Again. No.

Seriously, SE's already drifting close to that "its small and cute to the point it's creepy" with the Lalafell and Auri women, I would only hope they stay away from adding playable children because it would be crossing right into that line, especially when you've got the ability to wear fishnets and several sets have a more revealing allure.