I have done that also, but sometimes I wish for something stronger. The mouth is usually not a problem if both figures are human and the morphs are not extreme, but if, for example, I am trying to morph the Millennium Big Cat into Nergal then I would need all the parts of his mouth to scale with his snout, and without warping too much. (Yes I know there are easier ways to create such a character but just hypothetically, for the sake of illustrating the problem.) One of the problems with Satyress was that she has horns. The base of the horns is part of the head, and there is a chain of horn parts parented to it. If I apply a morph that changes the shape or size of her head, there is no way to tell the horns to move gracefully along with it, while maintaining their own shape. It makes logical sense to me that what I'm talking about could be done, but I'm not a programmer, so I don't really know how hard it would be.