You could do some basic communication with emotes, such as: tell someone to wait, tell someone you're ready to continue, ask someone to be in a fireteam with you. I developed an emote communication system for those basic messages. Everything else can be communicated if you choose to be in a fireteam with them. The way I have it set up is I'm ready: up, left (wave, point) Wait a minute: up, down (wave, sit) I'd like to play with you: up, right (wave, dance) All three start with wave and are only 2 emotes long so it should be really simple to remember. They can allow you to communicate the simple messages until you are in a fireteam with them. It isn't proximity chat but it solves the most common problems. Give me a bump if you like the idea!