I have no idea how we can make that possible, but it would be much cooler if we were encouraged somehow to claim sovereignty over every tiles around us, not just those few interresting superbonussquare.
Hey, I have an Idea, We could make an aditionnal form of sovereignty, for which there would be little to no upkeep, but would give out extra resources (a lot of rescources when the tile is close, a little when the tile is further away, close to nothing when the tile is very far). Not a % bonus, a real resource income, like an additionnal level 3 lumberjack or something.
This would encourage players to claim sovereignty over everything they can as far as they can. eventually, they will bump against someone else's growing area of influence, and they will fight each other for extra territory.
So if the tile is a good one, people will use the current sovereignty over it, and if it is a poor tile then they will use my new sovereignty.
This will eventualy materialise real fief territory. how exciting.
What do you think about it?