i agree that the dungeons are different but i don't think they are different enough.

this patch took a few little steps in the right direction, the Ozma platform is pretty cool and has multiple levels, the 1st boss in Weeping has two levels kind of. two of the Sohr Khai bosses have rather distinct arenas. the first Hullbreaker Hard "boss" isn't a boss (though I think that fight sucks), it is different.

dungeons can use more changes like that but even more drastic ones.

Haukke Manor is kind of nice where you retrace steps. not everything should be completely linear (though dead ends are kind of a waste since people will stop going to them once they figure it out the first time). they should make certain corridors have multiple levels so people can take different paths even if both lead to the same place. maybe have some with smaller mobs that are more prone to AOE and another with one big mini-boss type so that groups will choose different paths based on party composition.