Quote Originally Posted by TaleraRistain View Post
"Whenever we create a high-difficulty boss battle, we tend to include instant-death mechanics"

Maybe they should stop being lazy with their high-end content and not use these as a crutch for challenge. That's always been one of the most frustrating things about FFXIV. There are tons of MMOs they could take inspiration from that have challenging fights that *don't* lean on instant-death mechanics.
The reason they depend so heavily on instant-death mechanics is due to how insanely strong healing potencies are. Simple raid wide AoEs are rarely threatening because all three healers can bring players back to max HP in seconds or simply rely on Regen ticks since not enough happens to warrant a full heal.