We all know that Blizzard players like to play or discover OP combos. PvE may be fun. I am sure they will have difficulty levels to satisfy our most talented players.
I even have imagined that there may be an option for players to play enemy entities with in PvE to surprise players trying to complete the campaign enemy event.
Imagine someone saying, “Man, some of these Omnics are good. I am having a hard time with this one.” 