Ok you're missing a huge part of my point
Say these Barakas come up w these changes, but all the other character representatives disagree w them
Now multiply that times 32.....
I don't think character representatives are best
This ^^^
Not all changes will be agreed upon, I can guarantee that. You're gonna have people disagreeing with one another and feeling that x character is going to be patched unfairly (too many buffs). If this were to happen, they would need to be pick 5-10 elite players who not only play the game at a high level but understand the game and it's intricate balancing to a high degree. People with diverse character rosters and good knowledge of the game should be chosen as a) they don't have one sole character so they're less likely to bias towards that one character and b) they actually understand all of the characters their changing lol. People imo that should be considered:
REO - Kabal, the entire cast pretty much as he plays most of it.
Detroit - Kabal, Shang Tsung, Smoke, Reptile.
CDjr - Jax, Liu Kang, Kung Lao, etc.
Maxter - Cyrax, Johnny Cage, etc.
Tom Brady - Sub Zero, Raiden
Perfect Legend - Kung Lao, Raiden
Pig of the Hut - Kenshi, Freddy, etc.
Wafflez - Smoke, Sonya
Main issue is, nobody really uses the low tiers out of the "elite" players, so some people may feel uneasy about these players balancing them, which is understandable because they don't main them but realistically they're probably your best bet. Even if they don't suggest changes for said low tiers, but at least player test them.
EDIT: I'd love to include people like Dizzy, Tyrant, Etc but as far as I know they only really use their main, I have no idea who else they practice with.