I really love the design, though there's two things that feel odd to me:
The crown doesn't sit properly in perspective. I've tried to construct it, but it's still a bit off because I eyeballed the VP and the dimensions of the square.
The other thing I noticed was the belly. To me, she looks like she's in early pregnancy. I think this may have to do with the symbols on her stomach which are slightly shifted to the left. I don't think there's something actually wrong with the proportions.
Edit: Something else that jumped into mind. Have you tried putting the staff in her right hand instead? That way it wouldn't block the body as much and you could position the highly detailed ornaments closer to her face, guiding the viewers eyes to where they belong.
I can't wait to see the finished piece.