Even If you loved Dark Age of Camelot, stay away from Warhammer Online. At the very least, wait another 6 months.
The good:
In theory, the game is incredible. Innovations like public questing and open realm vs realm/scenarios are awesome. The classes are not your everyday cookie cutter tanks-mage-rogue-healer, meaning a lot of interesting hybrids. Models and environments are well done. Long time fans of Warhammer universe will have nothing bad to say about the art direction. Oh, and the opening cinematic is pretty awesome :)
The bad:
Animation is so so sloppy. Casting and reset times are broken, just plain broken. World feels like its made of glue (you get stuck in all but the simplest geometry). Non-public quests are boring. Crafting is silly. The Realm v Realm combat is unbalanced. I mean really unbalanced. The game "feels" empty, especially in certain tiers.
My suggestion is to wait for things to smooth over some more. Maybe it needs another server merger. It has been 7 months and still the game is barely playable. However, Mythic does have a great track record of long term support. If you do wanna play the game because you love(d) Mythic, I seriously suggest waiting till reviews get a little better. If I cant convince you, at the very lest, hit the forums. The class unbalance will leave you possibly gimped and frustrated.