While I'd slightly prefer for this, especially in the form of the Endless desert itself, to simply be a very real zone in 4.0 or 5.0 (bringing out the themes of either) with limited shared phasing (you see only your party, events, changes, content, etc., unless flagged otherwise or when crossing certain areas), this sounds great. I suspect some people might complain that there aren't enough scouting advantages, etc., for the day time to be as fun as the night time, etc., or that certain environmental elements are too severe, but I'd love to see this concept explored and implemented.