Mercy’s weakness back in the day was being a single target healer. That’s where we need another rework that comes in and implements that.
We need Resurrect to be moved out of the base kit because it being along side Damage boost makes Mercy super powerful.
Changing GA doesn’t nerf Mercy it changes her playstyle.
Putting Resurrect as a meter honestly won’t do to much. Sure it will be harder to get a Resurrect but it’s still in her base kit which is just too strong.