I am a Mei/Sombra and I’ll am willing to step in here.
I want Sombra to be viable, but I don’t like hard counters. I don’t agree with the matchup between Sombra and Doom/Ball.
I would rather her strength was more across the board, rather than spiky as hell towards a very small select groups of heroes.
If Sombra is weak vs most of the lineup, and super strong vs a small section, I don’t think that is good balance, and it isn’t Doom or Ball players fault. It is the Blizzard dev teams, because they made the choices.
If the Doom or Ball players don’t want her to be viable? Then they are also a problem, but not the same problem.
I disagree that the game should be THIS much about matchups.
I’d make hack shorter, EMP smaller, and her gun a lot more dangerous, by giving it normal falloff.
Doom and Ball would survive the fight more often, because they won’t be hurt for so long.
Sombra would be more useful in the main fights.
Right now playing Doom into Sombra without Zarya backing you up isn’t like, the play I would do 