I am so glad many of you brought up the fact that Sauron's Vampire form is non-canonical. I mean, he took the form of a giant bat with blood dripping. I don't see that with the bat swarm thing that he transforms into. I mean he is Sauron, not Dracula.
Also, as I posted about Sauron's different forms, I feel that Sauron should have a snake form in his Power of Ages past repertoire. I mean that is canonical and there is already a thread if you guys wanna read about it. It is titled: Sauron's third stance.
Anyhow, I feel just some small tweaks to Sauron and maybe make the hero nazgul unit have more HP like some of the other nazgul and we're good. I feel the 5 nazgul are too weak, but then I understand why, because Gandalf, Aragorn, Glorfindel (and if going by the movie) Elrond and Saruman can take on many by themselves.
So whatever ET decides with the hero unit I am okay with. But Sauron needs some tweaks, big time.