Pasting in from the gp review thread
Played heaps on the weekend - started with that and jumped into bounties, rifts etc. So far all the loot looks the same, I feel so casual coz I'm looking at the numbers rather than the bonuses. I ended up in - what i think was - a greater rift the other day (needed a key to join) and got some green gear set stuff. Ahhh feels good getting decent gear! Watching the gear set perks activate as I equip reminds me of The Division (which they stated was influenced by D3 so it's cool going back to the original format.)
Had heaps of fun co-op'ing over the weekend, played heaps, and am up to Paragon 40-ish.
Gameplay-wise I still kind of feel like it's "hold a, press other buttons as they become available and wait until everything dies" but I'm sometimes going for the highest difficulty available to me, which usually gets me matched with much higher players. Other times will be just over my level so I'm not completely useless!
Hand held it does get a bit muddy with too much combat on the screen but framerate never dropped.