It seems to me (at least, from watching Pbat's videos) that the late game PvE is very lacking.
Since you would have near best armor, the enemy can hardly hurt you, so you just take the hits. Not only that, but there seems to be little incentive to even go to the trouble of killing bosses and such, because they always drop the same thing.
Maybe if bosses dropped randomly generated items, it would flow better. While they're at it, they could make bosses a little harder, and maybe add more cooldown to potions.