I don't think the light from straight above really works. A bit further back, to just light up the hair and not the face, or to the front (but further away), to take care of the shadow from the nose. (But I'm not really competent to offer advice, just thinking about what I might have tried...)
The play with the shadows is surely creative and original. Sometimes beautiful (her forehead, under her eye) but unfortunately sometimes less (her nose...)