I’m not going to go on at length about the things I saw in the WotLK beta, because I don’t want to spoil it for anyone. I’ll just give general impressions.
First – the parts I have seen so far are beautiful and artistic.
Second – I have done about a dozen quests, and so far I have only had two “kill X of these things” quests. That’s good, because those get old, especially in a starting zone where everyone is competing to get the same mobs as they spawn.
Third – I have yet to replace any of my epic gear with green drops or quest rewards.
Fourth – my damage is fine. I remember when I first went to Hellfire Peninsula when BC came out. I was level 60, and the Starving Hellboars were level 58 but they hit HARD. I had to bandage myself after every 2nd kill. It was really slow going (of course, I was in level 60 blue gear then, with no raid experience or tier gear). Now in Northrend at level 70 wearing T4/Kara/badge epics, I find that the mobs are no harder than the ones on Quel’Danas that we kill for the dailies. I can kill quickly and efficiently as a rogue.
I specced into some of the new combat tree talents. I’ll let you know how they work when I get some more time to observe them in action.