Earlier quoted context omitted.
The problem is, they are planning to hand their toxic playerbase a tool which will let them inflict actual consequences on another player, where previously they could just say mean words and get muted. I guarantee less skilled players will have dirt-low ratings.
Are they? The page says "The reputation system tracks a variety of in-game actions that can be positive or negative, assigns a score to them, and applies effects to players' accounts". It's not obvious to me that this involves discretionary player input at all. Like, you don't need player input to look for insults in chat, or quitting in the middle of a match, or firing on one's own team.
Hope you don't do anything creative or interesting that could be misinterpreted as your not playing to win. Hope you don't go off meta too much. There is no chance they could create a system that will account for player creativity without punishing particularly creative players for it.