There's really no need to communicate in there though. The only time it feels like you're working together is when someone shouts for a raise somewhere. Outside of that you're just silently rolling around the map from one CE to the next in the murder ball. It's just a glorified hunt train, except in an actual hunt train there's at least enough time between marks for people to socialize.
I really hope in the next map they add more objectives that require people to coordinate. They did it in the Bozja raids there's no reason that sort of stuff can't be in the zone itself as well.