This still makes comments like "Please let me take a rook before you checkmate me" to be possible which 2 members that teamed up might be likely to do to make sure both players get a score above the player they teamed against. I get where your coming from though and I would not mind having chat enabled again too much.
(Inspired by https://www.chess.com/clubs/forum/view/claim-win )
Many players disable chat to prevent teaming. I did it several times too (sometimes later than I should). But when there are 2 players left in the game the teaming is not possible any more. So, the chat should be automatically enabled again.
@BroncoB is right (read https://www.chess.com/clubs/forum/view/claim-win ) many players do not understand the "Claim Win" button purpose (or do not notice that button). The games continue for no reason, it is a waste of time. One of the players could tell another about the button, but ... the chat is turned off.
Turn it on, please. And if one of the 2 players starts insults or whining, another can use /stop-chat again to finally kill the chat.