No one misses old mercy they miss day one valkyrie, and I agree. I find her ult when first changed balanced her with her 30s ability. Now her ult just becomes a worse Orisa ult with wings pretty much.
I think it's because of the league guys that mercy got nerfed. They all said resurrection was an op ability in a fps, which resurrection is always op in any game and OW is much more than just a FPS. They do need to stop nerfing mercy, but tbh imo staying a mercy main isn't going to help. Stop playing mercy so her pick stats drop and they will do something. That's what happened with Mei and sombra. My suggestion Moria or Ana since those two are pretty damn synergistic