I like threads like these. I agree a lot with commonly named improvements, and as I didn't play warband as much as others here I might miss some things that maybe are already added to Bannerlord. Anyway, after 10 hours of gaming, to sum it up:
**** Making it easier to accompany caravans
*** Making smithing worth while
**** Better role assignment for companions, I want them to guard garrisons, improve their gear and have some insight in their RPG elements.
**** overhauling the hideout quests to create more options for the player and immersion. Let player choose his team and loadout as well, more soldiers = less loot.
*** More options in the towns and cities, I can't kill anyone, i can't change my loadout or take guards with me.
**** Dialogues. I understand this is largely unfinished but:
- Conversations shouldn't automatically end.
- Bandit/looters/free faction dialogue can all be more diverse.
- Many relationship possibilities can be added with the random generated mechanics, bartering/affairs, etc.
**** more options to complete quests, for example resolving Family Fueds or New Gangs Moving In. I like the option implemented to fail quests by accepting a bribe.