What I'm liking...(not raiding yet, just experience of some of the new dungeons) is that they seem to have pushed away from gearscore (you can't make gamers give it up, but it REALLY isn't so important now), and actually base success or failure on actually doing things. Know the dungeon, know how to react to events, know when to heal and when to move, when not to stand in the fire etc.
Some dummy dripping in epics who doesn't pay attention and just nukes WILL get you killed, whereas a guy in half blues who actually has a clue will help get you thru almost anything.
As for Yahtzee's experience, 1-60 is just plain better than it was a year ago, if you hated WOW, you'll still hate it, but if you weren't sure, might be time to give it another go.
That $15 a month sure is cheaper than a COD Black ops a month.
PS: Plants vs Zombies bonus quests too!