which by the time 2.0 comes out there will probally be, or (will have been) as i have pointed out already, new content makes old gear obsolete. if you only play dungeons because you want the loot then all new content will only keep you happy for a for a few weeks at most, where as if you go through a dungeon because you like to interact and play with others the enjoyment will last longer.
test for ya. in 1.21 we get 2 new dungeons and hamlet defence, after tha you tell me how long before you got the drops you wanted and you are bored again?
your way of looking at a dungeon is making it impossible for you to ever be happy with the content they release