They didn’t nerf her really hard?
They nerfed her so hard that they ended up going for the one thing that wasn’t changed by the rework at all. At which point, she became so trash that they decided to give her back 55HP and now we come to present-day Mercy. Meh in OW1 and hot garbage in OW2.
Bastion and Sym players understandably get nothing from the developers but their nerfs and changes just can’t be compared with Moth Mercy which was so broken it needed several volleys of nerfs to address.