I would of rather had something like an AOE emergency off-gcd no mana heal with a 2-3 minute cooldown that fully heals all party and raid members around you.

Or a shield that gives you shielding based off how much max HP you've lost. That would of been a cool mechanic, so if you have 10% of your life left 90% of the life you don't have turns into a shield. Which gives you time to bring everyone back up.