every dungeon there is some cheap tactic to use and most people just run through the dungeons, plus there are only 9 or so.
there is no end-game
Lies and slander. For one while there are nine dungeons total, each has at least four paths to take, leading to markedly different experiences. This makes for at least thirty-six different possible dungeon scenarios to play. As for end-game. No raids or endless gear progression treadmill, so if that is your narrow opinion of what counts as end-game than yeah, but obviously if there was nothing to do at max level nobody would be playing. So that is a boldfaced lie.