Tanks that annoy the heck outta me.

[HyoMinPark]

Healers can move alot easier than tanks. I would rather not have the tank face the boss on the party just to get in the aoe heal. Just adjust the aoe placement. kthx.

If it’s something like AOE raid damage that an AST is trying to mitigate with Collective Unconscious, so long as the boss isn’t doing any cleaves (which they tend not to during things like ultimates—Aerial Blast, Hellfire, Earthen Fury, etc.) there isn’t really much of an issue of the tank sliding in to stand under the bubble during the outgoing damage, and then returning to the front of the boss immediately afterwards. It’s all about knowing a boss’ mechanics and timings. The AST’s placement is also important as they need to be able to cover DPS as well, and if the bosses’ hitbox is relatively large, they can’t just stand in the middle to get everyone. Not to mention they cannot move during Collective without canceling it entirely.

There’s also no reason for a tank to move out of a healing bubble after a healer has already placed it. The amount of times I drop Asylum, Sacred Soil, or Earthly Star directly on the tank and they run out of it is astoundingly annoying.
I also have the same issues during content with ranged DPS being off in Narnia, not getting AOE heals, and then complaining when they have low health or die. Want heals? Move in.