First let me start off by saying how impressed I am with this program.
I think it would be great if you could add multiple arms, legs, digits, eyes, ears, etc to the character, as well as being able to morph the face into a snout or muzzle. Perhaps even go so far as to be able to add multiple wings or horns, a tail or two would be good. I'm not sure how difficult it would be to do this, but I'm definitely willing to code it if enough people think this would be a good addition.