What I'm worried about is that one of the mechanics they wanted to show on the stream was ONLY for the Aztecs. What if the Aztecs aren't the dominant nation in Mesoamerica? What if the Aztecs don't exist at all?
Lets hope its for all non-Mayan nations in Mesoamerica. Otherwise it would be quite stale.
Also how does it work? You need vassals to prevent unrest?