Biggest issue right now is probably her lack of an upper leg. It looks to me like her knees are right below her butt. If you extend that out quite a bit, maybe widen the hips a pixel or two, and curve the lower legs backwards more (look up some reference for that, but the calves and the curve of the shin bone often make the lower leg look like it's bent), I think it would make a huge difference. Might want to extend her buttocks crevice up and back just a little too, it looks kind of flat and small, like a baby's butt. The colors are looking suitably angelic right now though, I'd like to see the finished product!