just a quick thought:
it's really hard to tell though what you want this to be doing. the sizes of the features imply perspective, as the eyes are too small for the nose which is too small for the mouth, but the angle of the nose etc implies the opposite perspective in action. Overall this is flattening your piece.
I went for a more frontal nose, but left your sizes, as like I said i can't be sure what your aim is with that.