Or just speeding up the ageing would also work. You'd need 10x more diplomacy and dialogue options than what is currently in the game to really make the game something special.
Dialogue options and diplomacy is pretty horrid atm. When you enter your own fief and no one recognizes you. People referring to you as a he when you're female. Currently I can talk to another lord about marrying my son with his daughter but there's no way for them to meet in person. When you capture a king or enemy lord there should be a massive amount of dialogue options for doing all kinds of things, signing peace treaties, trading fiefs, marriages, alliances, ect. Basic dialogue options with companions even on the warband level is completely missing, it's ridiculous. Not being able to give your own fiefs to clans you recruit because you need high trading skill perk.
Maybe in a dlc we can get new land and factions. I'm sure Taleworld will release at least 1-2 for bannerlord, given it's financial success. I'm more optimistic about future mods.