what about a new morph system .I don't know how it is called.One morph target is linked to a certain value.This could be useful for some blink morphs over an eyeball.0 is open ,1 is shut .Till now at 0.5 the eyeball pokes through the halfshut eye.A new system could change it.You could create a new fitting morph at 0.5 avoid poke throughs.