I’m just going to leave my feedback here real quick, and say that my biggest problem with the expansion is simply how unfriendly it to solo players, especially the hero challenge unlocks being unsoloable. On top of that Revenant is pretty much incomplete without Herald, and playing Revenant in PvE as a direct result is awful and completely unfun.
This is why I’m pretty much only playing PvP and have absolutely no desire to spend any more money on the game, or ever touch PvE again.