A few considerations for the new estate system:
1. Infrastructure: I hope building/upgrading/maintaining roads is included in the consideration, especially if claiming an estate in person is maintained.
2. Harvest: Penalty, same as the tax penalty, for regions without sufficient coverage should be maintained. The theory being that without close supervision, the commoners might not be entirely truthful about their produce. This helps give more bargaining power for non-C/S/T nobles in exchange for less tax gold and hopefully allow any decently managed/covered region to provide, relatively, equal income even if only in political capital rather than simple gold.
3. Logic and Politics: Recruiting of local units. Realm capital remains the center of recruitment for the whole realm, while individual regions can recruit locally produced unit. Providing militia is the most obvious consideration, ability to defend regional rights is another. This helps regions to defend itself against their government. As long as they can convince other nobles that they have justifiable complaints, they should be given the opportunity of making a stand. This may provide a richer role-paying experience instead of simply seceding or defecting. Basically a very strong protest just short of rebellion, which can escalate if mishandled.
