I like this character, nothing about it's anatomy I'd change really works pretty well.

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I've done a sloppy edit if you don't mind to try fix some parts that need more attention imho, first off I've knocked this down to 13 colours from 15.. Mostly colours that could be shared between the hair, boots and skin.
You seem to have pillow shaded this to a degree, remember to push for a directional light source so it's easier to portray shape for your character, if the lights flat on you'll just suceed in making your character look flat.
Im not too great at skirts, and I can't exactly find any great reference pictures to help with it (all seems to be mini-skirts and naughty stuff..) But after holding a towel up to that shape it seems it dips in the middle which would make sense, could be pulled off better but this is how I'd generally go about it..
Tweaked other places too the strands of hair on the left don't need the lightest shade on imo, since it would be shadowed by the head, plus it may help to push it back more so there's more dimention in the levels.
Tried to fix som AAing too, you'd banded some places unecissarily.
Oh and the lightest shade is so close to white, and the darkest shade is so close to black.. Why not just round em off? Won't make a difference overall but is just common sense to clean up your palette's distribution.
I'd lay off the dithering for something this size unless you want some texture to show or you think it may work.
Erm, lastly I just used lighter shades for the lines facing the lightsource where needed. Just more control of line thickness really and goes an extra step to help to shading shape the character.
Good work, hope my comments are of some help.