Just chiming in to say that I support this. It doesn't even have to be children, per se - they could add playable hybrids and let us play as Lalaqo'te which would likely look pretty close to that model.

I, personally, really like playing cute characters but do NOT like the potato-like qualities of the Lalafell. A race sitting somewhere in-between Miqo'te and Lalafell would have been absolutely perfect for me. Like the Lyn from Blade & Soul:



If the next race filled that particular niche, I would fantasia to them instantly. It's a very obvious hole in the current lineup, plus it would have HUGE appeal in Japan, China, and Korea. Seems like a no-brainer to me.