I hear we might be returning to D1 locations at some point in D2
In case you didn't hear, some of the leaked audio files indicate we might be returning to areas from D1 like the Cosmodrome, the Hellmouth, the Ishtar Sink, Meridian Bay, the Dreadnaught, and the Reef.
Well, remember when some parts of the Cosmodrome returned in RoI (as part of the plaguelands) and its appearance was given an almost complete overhaul? If the returning areas are given that kind of treatment, I'd consider going back to them a good thing.