I'm not really sure what bothers you about the face. I'm really not noticing anything that really looks out of place. I guess that her right eyebrow seems to extend closer to the nose than the left one. And I feel like her nose may be a bit small (at least for me), but I'm not sure if that could be that.
Either way I like where the drawing is going. Are you planning to polish her more or was this more like a test?