1. The option to have relatives (like brother/sister/cousin) which can join your party but also can govern fief(s). However, it'll be cool if this "relative(s)" can be called to become your party member again when you need them and when you don't need them you can send them back to govern fief.
2. The ability to upgrade village into a fortified village, which enable you to build: 1.walls 2.basic economic buildings 3.castle
3. The option to have your own "unique" heraldry or coat of arms, that no AI lords are using (almost all the available banner that i can chose in different mods are also being used by a lord somewhere out there in the game)
4. add more benefit of having a wife, like different type of wives give different type of benefit. The "wild and like to hunt" wive may give your troops some morale bonus, the "Ambitious and want to make a mark in the world" can give you charisma bonus, allowing to hire more troops.
5.increase the morale bonus given from "leadership skill" to allow you forming a much bigger party.. (i have +150 morale bonus from leadership, +50 from base moral, around +70-80 from food variety and around +30 from recent event... so if i want to keep the morale at a minimum of 80, i can only have at max 170 troops), if you can tweak the leadership bonus i'll be grateful