The game clearly lacks regarding dungeon contents, as many of you said it's basically rush from point A to B, pull as many mobs as you can and AOE them down. This has been like that for years now and I feel the concept has really gotten over used, especially when you have cleared those dungeons dozens of times.

A potential fix to this issue would be to include harder versions of these dungeons, with greater rewards, achievements for clearing those with a special comp, or killing a boss at a special time.. or finding a secret room that would appear randomly, offering a secret boss and extra loot. Not your average useless loot though, more like a minion or even a mount, glamour and extra tomes.
It doesn't even have to be a secret room, but one of the boss could be replaced by another, like the dragon that appears in brayflox longstop in the middle of the 3rd boss.

Those are just random ideas, but I feel it could add some diversity to the game.