Just had my first taste of online in this game and... Yeeeah, I'm sticking to solo play.
We killed Diablo and Baal on Hell and I literally didn't even get a glimpse of what the bosses dropped. Everyone just huddled around the boss near the end and tried to scoop up everything as fast as possible and portal away.
Also 3 of us got killed by those annoying stunlocking axe guys in baal's throneroom and people didn't even create portals to help out, had to run all the way back from waypoint, dodging enemies and someone had stolen my gold and full rev potions
Absolute insanity.