People need to understand yougame hosting before calling it the savior or the devil
First of all, yougame is not a mod of any game, but a browser based game platform that can be used to host online matches for retro games and mods including project plus.
This makes it closer to things like parsec and fightcade rather than brawlback.
Secondly, unlike fightcade, yougame does not use ggpo IE rollback. (Probably)
To get into weeds, yougame hosts their platform on a browser as opposed to fightcade having the emulation done via the client.
The benefit of doing this browser based that its a less heavy load so packet losses are less common.
However I don't see anything about yougame using predictive inputs and rolling back gamestates if the prediction was wrong. Since the browser itself is running the game, I'm thinking its not trying to rollback but simply there to stabilize the connection. I'm not actually sure how it solves discrepancies between two instances of a game tbh, yougame isn't open source and I don't see any literature.
Could yougame be an improvement to what we currently have? Very possibly, but it will probably depend on how well it runs on both browsers.
Does yougame use ggpo rollback? Probably not but I can't say for 100% certainty. Based on the context of how its hosted its highly unlikely imo. Edit there was a github i missed it totally does
Is yougame AI slop specifically made to spite brawlback? Absolutely not. Its a game hosting platform that could possibly be useful for P plus.
Don't jump to conclusions. Do your own research.