Mercy will more than likely will need an EVENTUAL third rework (eventual as in NOT BEFORE ALL THE OTHER HEROES THAT NEED IT MORE THAN HER).
After all, those nerfs to her rework was to make her not be a “must pick”, but her numbers are not showing that. She’s still close to the top for picks no matter what, being beaten out by Moira, and once in a while by Zenyatta.
However she’s still back in after a short period of time.
She’s STILL almost at the “must-pick” status even after those sets of nerfs were put into place.
Usually this would mean she’d need another nerf…and the only thing Blizzard can nerf is Valk.
They didn’t touch her base kit, and I would assume the wouldn’t still. They won’t remove rez, since in the first patch-note of the rework, Blizzard AGREED that reviving a downed teammate was a CORE part of Mercy’s game play.
So nerfing Valk would be the only thing they could do; like chain heals/damage boost, infinite ammo (which, how many Mercy’s can even use without being reported for daring to pull out their pistol) and flight.
But Valk already provides very little in the terms of an ult (no burst heal or damage output, small AoE that makes it difficult to get the utmost use from it, best to use before or after a fight rather than during), so would nerfing that even do anything?
The rework was botched, and the response to the rework was poorly done as well. Mercy is still one of the highest pick heroes, and that Blizzard tried to change and pull her from that.
Since she can’t be nerfed anymore, and by her pick rates “shouldn’t” be buffed; what else is there for Blizzard to do to get out of this loop?
(My friend states that we’re still in the Mercy Meta because you see her in almost every game, and more often then not the team with a Mercy wins over the team that doesn’t)