New Orbis - MESH or Hub and Spoke?

I have the oroginal Orbi and could not be happier.  I read that it is not a true MESH system as each satellite communicates directly with the router through the dedicated back channels.  I see a new Orbi system out (the AC2200 set, I think).  Claims up to 8000 sq feet coverage.  A diagram suggests that it is a true MESH system as it shows a satellite communicating with another satellite.  Anyone know if that is the case or are all Orbi systems still Hub and Spoke?  Thanks.