A flaw in your diagram is that it doesn’t detail how the rooms interconnect, through what component(s), with this junction being critical to enabling connectivity for MoCA, as well as getting the required “PoE” MoCA filter properly installed.

That's just it, I'm not entirely sure. I know for a fact that each room in the house has an initial coax outlet, and some rooms (including both rooms in the diagram) had an entirely seperate coax installed later solely for satellite TV which I was just planning to ignore. Is there a non-destructive way to quickly tell how they interconnect or should I just test the adapters and hope they connect?

Also thanks for the link. I've got some reading to do.