Mercy needs burst utility to help out in the midfight, but rez on cooldown is overkill. Either restrict rez to Valkyrie or make it her ult again, and fill the E slot with something that’s more engaging and can be used more often.
Case in point:
Pacify: Skillshot ability. 10 second cooldown.
Mercy briefly disconnects her beams to gather energy at the end of her staff, then fire it like a Symmetra orb. This orb is a Pacify debuff that reduces a single enemy’s damage for a few seconds.
This ability requires mechanical aim, so it’s a good introduction to FPS skills for new players who picked Mercy for her lock-on beams. It stays loyal to Mercy’s theme of “peaceful pacifist healer”, and would be described in-lore as Mercy trying to settle conflict by pleading with the enemy to consider a non-violent resolution.
Voice lines on impact:
“Please, you must calm down!”
“Can’t we talk this out?”
“Violence isn’t the answer!”