I don't like the feel of unholy...
Firstly, they didn't fix ghouls, they are still weak and other players can kill them quickly.. you're a sitting duck after that.
Second, there is no "BOOM!" ability, but there is one on frost (KM+oblit). These abilities are really helpful where burst is needed quickly.
Also, adding to the ghoul weakness... conversion and that other crappy talent still suck, so you have to choose death pact which makes your ghoul even weaker.