On the "new WoW engine" topic
Much to my annoyance, at an increasingly frequent rate, the "WoW needs a new engine! It's still based on Warcraft 3!" discussions show up again. First, I don't think that's actually what people want when they say that. Second, there's very little if anything from the Warcraft 3 days left.
Blizzard is unlikely to tackle this topic directly outside of the "we're constantly upgrading the game" quote they've used before. There's few people outside of Blizzard who are qualified to speak on this, and I'm not one of them, but given my experience, I feel like I can at least try.