To complete the whole GM aspect of the Zeus DLC, I think it's important that the Zeus player can "spoof" themselves as another NPC, allowing them to communicate as that particular unit.
<Players destroy an AA emplacement>
Zeus (as HQ): Alpha, this is HQ, close air support is now available.
Alpha 1-1: Requesting air support at coordinates xxx-yyy.
Zeus (as HQ): Roger that, Alpha, close air support is on its way.
<Zeus now selects the air support, say, a helicopter named Viper>
Viper: This is Viper, Alpha 1, I'm coming up from your rear...
Just an idea that could help facilitate more involved play from both GMs and players.