Don't know how many of you watched the blizzcon panels for diablo, but we have some exciting changes coming soon.
We have a armory system coming in allowing us to switch specs/gear on the fly from a npc. Nice addition.
PTR is just about to have our Tristram expansion go live for testing which I expect we'll see live on servers within december. A portal will be open next to the well in tristram which will lead you to the retro Diablo 1 experience. 16 floors, 4 bosses, and lots of easter eggs.
We also have the necromancer class being added to the game. The rumor is we'll be seeing it around spring of 2017 which could open up further classes being deployed to diablo 3. I feel like they've decided to support diablo 3 with further content while they work on diablo 4. Since no expansion was announced during this year's blizzcon.