I like the idea that the world will actually be evolving instead of remaining static forever, but I don't like the idea that some of the old areas, quests, and instances may disappear entirely. I'm hoping they keep all of the old stuff too; maybe it could be accessed through the Caverns of Time.

I like most of the new race/class combinations. I've been an advocate for Gnome priests for as long as I've been playing, and I am glad to see that Tauren will take their rightful place as the undisputed masters of healing. However, some of the others don't work so well, in my opinion. Night Elf mages? Dwarf shamans? Undead hunters?

The new races are cool too. Considering that they were originally supposed to be a playable race at launch, Goblins are way overdue. Worgen look to be decent, but I would have preferred to see Tuskarrs or Furbolgs or Pandaren in the Alliance.

My biggest concerns actually lie with the storylines. There isn't anything so extreme that I don't think it could work, but I will be interested to see exactly how some of these things happen.