Currently all the dungeons feel pretty much the same. There is only one path that you run forward and no matter if the dungeon is set outside or inside it all feels the same, just with different "scenery". It would be really cool to have multiple paths/larger open areas and having some real goals, currently showing the goals does not even mean anything because all you do is run forward and kill bosses, no variation at all. To me getting new dungeons does not even sound fun anymore since they all will be the same format.

One game that actually has pretty fun dungeons with some variation and other player interaction than just endless trash killing is guild wars 2, despite the game otherwise being pretty trash the dungeons were pretty fun and had some kinda exploration feel to them.