Nah! I think the head it's Ok!
Excellent skin! But can u make it transparent so it can look like a real ghost (I haven't dowloaded yet! I'm in my computing class at school! Keep the secret Ok?

)? Or can you create a model of it with a morph animation? Just it can have some kind of ethereal form ability like the Tauren Spirit Walker.
4/5.
P.S And can you create a zombie dragon, too. With some decaying and rotting effects.