He talks about what it was like coming from working on Age of Empires III for Ensemble Studios, and Blizzard's theory of "concentrated coolness" -- they want there to be cool everywhere you look in the game. He says dispel and spell pushback mechanics are still due for updates, and of course he talks about talent changes (this is Ghostcrawler, what did you expect): Destruction Warlocks and Ret Pallys get mentioned, and he says there's a whiteboard in his office with a list of things he wants to fix. Affliction Warlocks, you're next. Beware of ending up on Ghostcrawler's nerfboard!
We're kidding again. GC also talks about the long-awaited dual-spec feature, and says that they're thinking of building in costs like the Mage table, where everyone will have to click on something to change a spec, or there may be a consumable charge. He specifically mentions a "trash" build versus a "boss" build, so we'll have to see how that works out -- it would be a little weird to have to get a full raid together to change over to your PvP spec. And lastly, he talks about the forums -- their goal there is to have people talk to each other, not yell at each other. And good luck with that. Very nice interview.