Appeals Committee. Disputed situations in tournaments.

I have an idea. Introduce a yellow timer in the game – a time during which the player was thinking and didn't make a move.

It would be simpler and would practically preserve the original idea if, in addition to everything else, the game report included a section on "opponent assessment."
You play, write a report, and mutually "express your opinions."

To avoid anything personal and without going into details, just a "3." Otherwise, there will be "post-match analyses," excuses, and clarifications. I think that if a person has this as a system, the assessment will quickly drop to around a "three."