I wouldn't mind something like FFX's Cloister of Trials. For XIV, the transporting mechanic can be used while the rest of the party defends (perhaps adds could spawn randomly, or on set timers - not to encourage speed runs, that is). Or the penalty for missteps in the puzzle is add spawns, environmental debuffs (electrocution, dropsy, etc.) Hidden treasures (or even unhidden maps?) would be nice too, but they'd HAVE to be worth pursuing. No filtered water or hardened sap, please.

Overall, a puzzle/trap dungeon would be a nice change from the normal gauntlet