I'm very excited about the trilogy/World Soul saga, extremely happy Metzen is back, excited for TWW overall, a little disappointed a large revamp is not happening at the time and confused on what Midnight is actually going to revamp in EK (if it's just Quel'Thalas, that might get old quick, even by building it from scratch to make it a much larger map) and The Last Titan in Northrend (are they going to redo the whole continent or just swap textures and doodads?). Somewhat concerned as to what will happen to WoW after 13.0 too, will we continue onto 14.0 with a new saga? will we have a soft reboot? or will we have a new game entirely?
Many many many questions remain, but overall I'm excited and I thought that was an epic announcement (even though I've found the deepdive panel to be quite light, and I miss that we're not having art-dedicated panels anymore, those were always my favourite). Also I'm not mad at the Earthen AR, they're cool, but I think they should have been an Alliance AR and Horde should have gotten their own. That and I really hope those humanoid Nerubians become playable too (the same way I hope Tuskarrs will be by the end of DF... one can dream)!
Out of the three Midnight is the expansion I'm the most excited about (can you imagine? me being excited about a Void expansion?) so they must me doing something right
Also even though we didn't get our World Revamp (YET), I'm very happy for the people who were rooting for an underground expansion! It's going to be a nice theme to explore and I'm glad that at least some of us got (almost) exactly what they were asking for!