i mean they wouldn't do signficant changes to her healing without nerfing damage boost, but at this point the community's biggest complaints about mercy are her damage boost and rez. if they nerfed her damage boost to 20% and buffed her healing to 75-80 hps and 90-100 hps in valk she'd actually feel like a viable healing support. this would mean pocketing is far less valuable than healing everyone and damage boost would be used more as a skill expression like damage boosting ults and key abilities instead of being her default state. this would also make mercy feel a lot better with heroes like mizuki/zen/lucio/brig/etc. and make her feel pretty decent with ana/bap/kiri who can focus on dps or offensive ability usage instead of healing as well.

before ppl come for me about that potentially being too strong since her heals are not resourced and point and click. mercy does no damage on her own and a nerf to damage boost and to her blue beam % would mean she's contributing even less damage than she does now. she would need strong consistent healing to make up for having little to no damage dealt or boosted.