Those actively running and contributing to the ecosystem with (but not limited to) witness nodes, RPC nodes, seed nodes all of the most active coders contributing to the coding that is done on Hive are all in there and that is the purpose of such a communications center.
To ensure that there is an effective means of communications for those who are vital to the existential security of the blockchain.
Would for example a team of people involved with building a new 'engineering project' need a place to work together in an environment that is exclusively concentrated on the set tasks at hand?
Yes.
Well, that is exactly what those communications channels are. Nothing more, nor less than a means for effective communications among people in the relevant branches and departments of Hive.
Ok, so basically, I won't get in haha.