*jumps in*
Hey; Love that design, this character looks great!
I wouldn't change the shapes much, as it's part of the character... So I think you might want to look a bit into contrast? If you look at your sprite in greyscale, you get this:
The hairband disappear completely, and the hair/coat/skirt/etc melts together.
Make the hair and scarf brighter so they pop out a bit? Also/or add a bit of outline to them to define their shape. The long skirt is better, in my opinion, because it's easier to read as a skirt.
Also you might want to make the coat more simple; those drape effect are cool, but they gives a shape that makes it hard to read. Especially on the right sleeve, it looks like she has several layers of fabric.
(sorry if I don't provide an edit, I'm at work! Maybe later today if I find time...)
(ahahah I feel so uncomfortable at giving people advises I wouldn't follow myself because I'm dumb .__.)