Been playing this a bit more frequently recently, started an Arcanist, and while squishy is pretty decent at trash clearing, just suffers a little at boss dps but i think thats mostly because my build is sub optimal.
I loved TQ and its expansion back in the day and this game is very familiar, obviously its the same devs but still its got a lot of the same mechanics which is nice.
Got to act2 a few nights ago and feel my Arcanist is a bit weak really to push on so im going to start a new character and this time try a build consisting of 2 classes (Demo and Occultist) and see how i get on.
They recently pushed the level cap to 40 and added a 3rd act to the game, i think i read end game will be lvl70 so only really around halfway though the current game it seems.
overall im impressed by it and theres enough content to keep you interested for a good while really.