1) Councils in every cities.
There would be two kind of Councils; Military Council or Civilian Council. If one city has a Civilian Council, lords has to work for getting civilian politicians' trust or support to implementation of their policies into City. If there was a Military Council in the city, orders would be implemented directly after Lord's order. Which city has Military Council and which city has Civilian Council at the beginning would be decided by mod maker, randomly.
If one city has a Civilian Council, Lord of the city could try a Military Coup to capture city's political control and put there one of his companions and few soldiers, but Military Coup could effect city population and reduce the tax effeciency. Or not a coup, but if there was one politician that always oppose of the Lord, Lord could try to assassinate him, and put there one civilian which follows Lord's orders. Which this way, if assassination success, tax wouldn't reduce and authority of the Lord could increase. If assassination fail, then there would be revolt against garrison in the city, and if revolt success that city would be turned into "civilion faction" with no lords. Relationship with politicians would increase with bribing them (could work on some of them, and could not work on some of them, if biribing couldnt work, relationship would decrease) or threating them (could work or not, if not work, relationship decrease) or helping that politician to assassinate his rival in the Council with a mission from that politician.
2) Lady Feasts
Our wife could has more mission than being "household and feast simulation". With this feature, our wife can host a feast for other lord's wifes, there could be two gladiator fighting in the middle of feasting room, also foods, drinks etc. Some of the guest ladies could increase relations randomly (if they enjoy the feast, if not then relationship wouldn't change). If one of lord ladies has high relation with us by attending lady feasts, then we could ask her to "would you like to be our guest again, with your lord?", and she would bring her lord in her visit. After that, we could talk with that lord and create family alliances.
3) Religions and cultures
If one captured city's religion and/or culture isn't same with your Faction, then there would be high revolt risk. Religion percentage could change in favor to your Faction's religion, like %2 for per week. And culture of the city could change into faction's culture like %1 for per week. If one revolt happens due to cuture and religion, and if that revolt succeed, that city would be returned to it's first faction. There could be "massacre population" choice in our military minister's dialogue, it could reduce tax revenue by %80 and to do this, there will be fighting scene in the city where armed civilians resist us. If we fail to win, tax revenue would reduce %50, also culture and religion of the city wouldn't change at all.
4) Enslaving Wives
Wives of the lords could be putten in prison after capturing cities. It could decrease our relationship with that lord, also made us lose honor.
5) Features that all other Native expansions have
HD Textures, few new items, new formations, banner maker, improved fiest scenes where lords/ladies are sitting in the table, diplomacy, Freelancer, Pre-Battle orders deployments, etc.