I would like to propose the idea of introducing a new role: the admiral.
The admiral will be a player (the best of the team in terms of win ratio?) and will be the only one to both receive and send radio communications, his role will be to act as team co-ordinator.
It might be useful to equip him with the ability to make lines and marks on the map.
In my opinion this could be a good way to implement team play and also giving more of a sense of community.
What do you think?