What Needs Testing The Most?

So what needs to be tested the most? I wanted to level a Blood Elf Paladin but I guess the teleport doesn't work for blood elves, I keep falling in plaguelands and then die, hearthstone keeps teleporting me in plagualands and the same thing keeps happening.
I'm willing to help in testing as much as I can since this is my favourite expansion and I want everything to be done as soon as possible since people want the TBC server as much as I do if not more and I also enjoy most of what I do in this game.
I'm willing to help in testing as much as I can since this is my favourite expansion and I want everything to be done as soon as possible since people want the TBC server as much as I do if not more and I also enjoy most of what I do in this game.