Quote Originally Posted by Nektulos-Tuor View Post
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.
Benediction is an off-GCD, no cost single target full heal and has a five minute cooldown. What you're asking for would have a notably longer cooldown than that.

And I think that's what Dissipation is intended to be for - "Screw my fairy slowly healing everyone I need to do work now."