Massively multiplayer experience was fun the first 20 levels… but it quickly hurts the way Diablo should be played: not surrounded by unwanted other players.
. Events and massive monster groups are wiped out by high level characters who cross your screen and destroy your fun and et you play a walking simulator… and sometimes we are the one who destroy the other people’s fun!
. World boss are a joke… yeah, 3 to 10 seconds life time. Oh yes, it’s once you reach Torment IV difficulty but… it should be harder than the previous difficulty level in theory?.. 
. Lags are coming for lot of players when crossing other people
. Timed event… We are lot of players who don’t think that having to wait an exact time of a day to be able to play a content of a game is a good idea… let us play solo and use whatever material to invoke a boss or a wave on our map…
It was a good thing to TRY to get MMO feature in Diablo licence. But now, we havre tried… it’s not fun anymore. Please. Stop this joke and put a button to play solo, like you did to skip story line.