I think it would be prudent to add a decision that allows the King to demand that all lords renounce their allegiance to whichever lord they currently serve and swear allegiance to their post-AC lords. A problem I have noticed in the mod is that over a few hundred years all the kingdoms get jumbled together and it turns into a huge mess. It's impossible to micromanage as it is, so this decision could fix things. Maybe some negative consequences for balance I'm not sure.