A bit late for early impressions but makes sense to still put my 2p as I think quite a few still haven't picked this up.
I've really enjoyed my first dibs into this game. I similarly enjoyed D3 and it really does play virtually like that. Graphics are quality. Story seems to be more engaging than the previous one too. I think the hardest part to get around is all the upgrades and all the skill trees as to what they mean as there is so many. What feels better on this one is the 'admin' you have to do seems a lot less as its easy to compare what drops you get to what you pick up. I like you can easily highlight junk and all I've been doing is junking most of it rather than selling it - this seems to give some transmog options but not got to that just yet.
I also like the idea that map is the same for everyone rather than procedural generated. The map is so big so going off to explore and find little side quests and dungeons seem more inviting than D3. Grouping has been pretty cool so far and being able to get 5 of us together is abit crazy fun. I still find this game abit less intense than FPS games like Destiny, so even though battles can look really cool, its also really hard to see whats actually going on...and I then look down to see me just spamming a certain number of buttons because it feels like the right thing to do.
I want to keep playing it for sure, but definitely alongside other games. I'm not too concerned on the time it takes to move through it, as I think i'd be more worried that I wouldn't go back to it much once I blitz through the official Act/Story missions. Worth the money though as I sit here right now.