In my opinion, the Best Performances system needs A LOT of tweaking. Most of the records at the moment are wrong or unreliable.
Let me show an example, in Brazil the record on points is by this guy that scored 99 points in a game... But he did so in a WO game
(1019721). The game results is changed to 25-0, but the players scores are kept so this guys unfairly owns the record. That needs to be fixed.
I am also completely against players that I never owned (that belonged to the team I replaced) having records on my franchise. (for example: on my team some dude has the record for blocks but he never played for my team, he played for the bot that I replaced in the league when I signed in on BB). So that needs to be fixed too.
I think a team's information needs to be completely separated from the previous team whose position in the league they replaced. One team has nothing to do with the other, it just took a spot in the League that was previously occupied by the other team. That's how it should be, IMO.