For a game about playing medieval rulers, there's a surprising lack of, you know, actually ruling. The interaction with other characters (vassals, family, courtiers...) is fleshed out, but interaction with your common subjects... not so much. This is a shame, given that how you rule your realm is important for the game's fantasy (play as a good king, or a cruel tyrant ?) and would also offer an interesting strategic layer. I think this rulership could come in the form of the laws of the realm. For example :
- Taxation. It's telling that currently, yielding to peasant revolts leads to lower control, the only way to lower how much gold you get from a county, despite control being how much control you have of the place and not how generous you are. Why would leaving more wealth to the common people leads to bandits running rampant, for example ? Thus we need laws on taxation of counties. There could be both gold and levies (how many men you want to levy) laws, with effects on the county (development, opinion...)
- Criminality. Currently it's done through faith. But it would be interesting to have your realm follow, or not, your faith. Going against it could lead to negative opinion with coreligionists, especially head of faith, and factions to change the laws.
- Clerical appointment. Same thing as before.
And many more. Overall internal politics would help the game be more fun and interesting.