I just watched the trailer. Wow, did I just see a fricken' fat guy have a bunch of electric fish explode from his belly button? Also, a WALL OF ZOMBIES!?! (No internet slang can sum up how awesome that is) Haha, those guys at blizzard make up some messed up stuff. Only 2 complaints, and they aren't really gameplay complaints:
1. The blood and gore. I know the gore in the other diablo games wasn't 'realistic' but the gore here is just too cartoony.
2. The sound effects. Most of them sound decent, but that constant 'SQUISH!' noise is annoying. Why does everything go 'squish' when you hit them? Even the freakin' skeletons go 'SQUISH!' I have yet to find an element, especially fire or hard steel, that makes a squish sound on impact with bone.