Granted this is something that probably works better for dungeons than raid boss fights.

But I like little things here and there like the steam vents in Sohm Al Hard where you can debuff enemies by positioning them near the vents, or in Arboretum Hard bringing muddy enemies under the flowing water to wash them off.

I kind of wish more dungeons had little things like these. (Or maybe they do and I'm just bad and not picking up on them?) Helps to make tanking in dungeons a bit more interesting.

Personally I'd like to see more things like this, whether it be leading enemies into traps to damage them or debuff them etc.