Could some new dungeons have bonus objectives?

[Mere]

For puzzle, there should be more kind of puzzle like on Temple of Qarn.

I'm a bit disappointed that the wall puzzle is always the same: Flame | Fruit.

About the optional boss: time limit can just be the 5 mins we are given to leave the instance once the dungeon is done... well 4 mins to engage and beat it and 1 min to cast loot.

And how about access to optional boss be granted after completing a challenge while running thru the dungeon, such as: Open all treasure chests, or kill all X enemies, or use limit break 3 times... etc. Things that tend happen naturally anyway... except for when ppl are really not interested (so many times I have run dungeons where no one ever uses the limit break... me being mainly a tank or healer don't have enough reasons to use it).