When you are playing in game and someone starts chatting the number that comes up next to the room tab. Having an option to turn that off or only displayed after you are eliminated that round.
Another option to mute the whole channel or maybe everyone in the server, in case sometimes you don't want to talk or hear anyone. Just want to play tetris hehe..
An easier option to play 1v1, maybe option to challenge someone or a status showing you are happy to play. I would like playing 1v1 more but most of the time I can't be bothered asking people.