I'm with Tiis; as a whole, Wrath has been disappointing. I enjoyed this article, as my own quest for Lore and the tying of loose ends has lead me down some of the same paths of thought that the writer mentions.

This post reiterates some of the same ideas and a few others; I've been following it and hoping for some sort of Blue response, but to no avail:
http://forums.worldofwarcraft.com/thread.html?topicId=20677632277&sid=1&pageNo=1

There have been good moments in Wrath, like the quest line in the Storm Peaks leading up to Thorim, the Son's of Hodir, and Loken. Even parts of Zul'Drak were enjoyable; but they're scope fails to be as broad and interconnected as what was accomplished in the Burning Crusade.

In fact the "star" villain of Wrath was dangerously close to falling into the realm of Saturday-Morning Cartoon villains, complete with "Haha! I could totally end you now, but I won't because you screwing up my plans is so amusing!" and "I'll get you next time Gadget... next time!" /strokeevilfelinecompanion. The new ICC instances do a lot to redeem the Lich King as an actual villain in my eyes. Halls of Reflection gives him the respect he deserves; portrayed as an unstoppably approaching force of cold and undeath, growing ever nearer, making you look over your shoulder as you run for your life.

If all of the instances and storytelling in Wrath had been the quality found in the new ICC instances, then the expansion would have been something special. As it is, it feels like something that could have been so much more than it turned out to be.