Right, because DKs are tough to play...
I'll tell you right now that in vanilla, the balance in pvp was not so bad. Warriors beat everything, Rogues beat everything but warriors, and everything else was fairly even. BC came around, it was glorious. WotLK came to ruin the fun, but we still enjoyed a great eighth season.
Cataclysm, what many of the people on these boards have been tricked into believing is WoW, is crap. Don't let them fool you, pvp has finally been completely erased from Blizzard's to-do list.
On to SW:ToR, glaring problems with ability delay, gear imbalance, damage output imbalances, CC, animation imbalances (if you don't know, try playing republic), issues with cover mechanics, and so on..
...Yet I'm having a blast. All in good time, we can only hope they keep a focus on pvp in the future of this game.
-Bandet