I like the idea.
Though maybe instead of making it a really hard "can't TO" thing, maybe we could make some kind of "resist TO" code where nations with a low Noble to land ratio would just find it harder to TO a region. Say either the TO options don't do as much, or that there is a "TO LOSS" rating running at each turn change with a higher loss for low density realms. Would that be easy to code?
Another idea would be to have an increased loss of region control for low density realms with the loss increasing drastically the farther the region is away from the capital.
Basically between the two it would drastically increase the regions that go rogue while making it harder to TO until the noble to region density increases to the target amount you wish to promote.
That would be a code that, once implemented, would be self regulating to the level you want it to be. You would never have to change it manually, once the bugs are worked out of it of course.
