When I first started playing, it was common to sleep the big guy so we could get the add down on the second boss of Brayflox before it killed her, then go back to the main boss when it was dead. Now it's just zerged even with new people.

There's a mob in Amaurot that tethers to the healer and severely gimps our healing until it's dead. Groups from the outset just AoE everything instead of trying to focus that down. There's a mob that can buff another in Dohn Mheg and makes that trash harder but nobody interrupts it. People stand in the DoTs in Aurum Vale.

The devs do put some of these mechs in the game but they just get ignored to zerg everything. They could do things like the second boss of Bardam's Mettle where it's unavoidable, but then there are concerns that those duties will get insta-dropped.

I think a really good place for this could be the Criterion Dungeons. If I have one hope for those, it's that they think outside the box in terms of dungeon mechanics.