Endgame already exist its called PvP.
I dont care what they do to PvE. To me it is and always will be means to PvP nothing more.
Regarding /players I dont care if or how they do it. 0 effect on what I do.
And I dont think Blizzard is capable of making ARPG endgame. Their last attempt in D3 has nothing to do with ARPG. Hopefully they can do it in D4.