Agreeing with Svper here. I really liked LK, the raiding upgrades have been fantastic for PuGers like myself. I just picked up my old priest, went shadow and did 6/12 bosses in ICC. Had a great time and the challenge was awesome in that I had very little knowledge of spriests and still managed to be second in dps after a little googling.

One feature has sold Cata already for me: Raids will be continuable such that you can join any raid that is say on 2/12. This has been what I have been asking for, now I won't be disappointed when the raid falls apart at Cata's Professor Putricide because we wiped once and it's late. Can I get a "Hell Yeah"?