An issue that people don't seem to be taking into account - on all of the islands, not just Dwilight - is that the region:noble ratio is skewed in realms with more cities.
Many realms have most of their nobles in richer city estates, because lordships have no value.
Many regions have less gold, often are in realms where most of the perks of being a lord have been stripped away - and so you have lots of empty regions that are in fine condition and probably making a bit of gold for the Duke each week, but contribute to the emptiness.
This leads directly to not wanting to have wars, because you already have too much land.
Summary: The Ice and Hordes didn't go far enough to actually change anything, and some islands could use a bit more shrinkage.
