Awesome! I love it.

UNPLAYABLE!!! the whole time, the game is loading some ♥♥♥♥ in the background, so that it´s a big laggy photoshow and that over a period of more than a year. nothing has changed! i´ve played it a lot, even with that lags and hoped that it gets better, but it´s worse than ever before. i gave it many chances, but now it´s over. R.I.P

Edit: Ok...i gave it a new try. I think you definitely need an ssd. i had an hdd when i posted the last feedback, what i´ve changed. It still loads some stuff the whole time, but now it runs smooth.
In my opinion, it´s excellent, how you pimped the endgame. Much, but not too much content. For me, it´s a good balance.
I tried the online mode, and it seems, that there are still issues. I can´t remember the problems, because i changed to offline mode. I play a summoner-poison build and could not see any issues. It seems, that the spawning of green globes reduces when i play over a longer time, but i can´t say, if this is normal or a bug, so i don´t give this a rating.
All in all, it has some "childhood illnesses", most of it are little interface problems. For example, you go to that gem lady, want to change the sockets of an item and it still displays in her window, until you move the mouse to the tabs she has. In the inventory, most of the time some empty cells have a white shadow, as if there´s an item marked. Sometimes, the wartable seems to react slower, when you modify the map/mode, that you want to run. One time, there was a sound issue. The impacts of the summons sounded like you have a bang trauma. A restart of the game fixed it.
But the most important...the gameplay itself runs without any problems.

In my opinion, the quality could be a bit better, but for me, that are issues, i can live with. Even when other developers maybe do it a bit better. But everyone started with nothing some time. I can´t give this game a neutral rating, but because the endgame runs good in offline mode and i have fun with it, i give it a thumb up now.

Oh...and for me, act 4 is amazing! I had goosebumps, because it´s exactly my taste! :-)