Whisper Team-mate to reduce "toxic" help
Currently providing feedback during a game, commenting on strategy, or trying to assist another player can only be done in team chat which is nearly always taken as negative or attempting to call someone out. I think that being able to whisper someone on your team to try to help or provide support would make people less defensive as they can see you are taking the effort to talk to them offline and not try to blame them in front of the team.