Loling @ people who actually believe ActiVision Blizzard could create a good act 6.
The only reason d2r is very good (not as perfect as the original LoD, but it's still very good) is because ActiVision Blizzard did not develop it... If they had, well—Just look at Warcraft 3 Reforged.
We need to be thankful that the warlock is OKAY. It's terribly unbalanced and the strongest build of all time, but the actual flavor of the class fits into D2 well. If they balanced it, it would be a lot better, but I don't have much hope for that for a few years.
I personally believe an act 6 would be terrible.