I understand some people may not want to use the mic or even perma mute voice chat for teammates, so this could easily solve most of the communication problems in game:
Pls consider adding some simple voice & chat commands like “Group up”, “Get back”, “Help!”, “Careful!”, etc.
Something like the Left4Dead games had and something like Dota 2 also has. Example: https://i.imgur.com/boQLv4V.jpg.
Also, maybe make them have like a ~1 min cooldown so they can’t be spammed non-stop.