I think the mesh density is sufficient for good expression morphs. If you want her to be able to show wrinkles on the forehead or around the eyes in some expressions, you will need extra cuts, but anything else should work.
Insane amounts of polygons are only needed for far out character morphs, and it dont make much sense to go so far outside the structure of a mesh anyway, it will destroy the expression morphs.
A small nitpick regarding the anatomy: I think the ribcage extends a bit far down on the sides.

Message edited on: 01/30/2006 13:14