I wish Toto-Rak and Darkhold had additional floors; so once you beat a certain boss mob on the first floor you then have the choice to collect the treasure and warp out or have an option to warp to a second floor. Once you warp to the second floor your timer resets for another hour or so.

It would decrease the monotony of the current closed dungeons. I don't really like completing it then re-entering to do it again. Some additional floors, routes and bosses would be nice. Say, if you killed Shaula in Totorak you got a warp to floor 2A that could lead to 3A, 4A, 5A etc, whereas if you killed Antaress you got to warp up to floor 2B, 3C, etc.

It would also make dungeon runs feel more "Epic" (using a SWTOR phrase..) and unique each run.