It's really disappointing how the game didn't develop any in this regard. There was this bug in Warband, don't remember if it was base game related or a mod, that sometimes an ally party started chasing you on the map. I remember how excited I was first time it happened, thinking an ally AI interacts with me eventually. Then found out it just considers me hostile despite we're allies.
Well, the game is still in development so I'm still hopeful that they'll add ally interactions. For example there is this mechanic that if there's an unsolved issue in your village or town, some stats I can't remember now (prosperity or loyalty I think) drop. And there is a sort of a mechanic in some quests that notables interact with you when you enter/leave the settlement. So I suppose it shouldn't be very complicated to combine both that instead of I, lord of the town, go to a notable to see what is up, they come to me and ask for help.
Sadly what you are saying is right, the game is barely different than Warband, actually, there are a lot of interactions that were in Warband, fire, and Viking conquest that just.. were forgotten, it saddens me, Warband was good, we are missing a lot of interactions from there for example (feast, asking lords requests such as follow, go there, help me here, marriage was way more interesting and etc) it was all just forgotten and idk if they even plan on adding it to bannerlord, Viking conquest is an improved version of Warband, with more new things added to it(ships, torture, threats, religion, settlements that we could build and improve, hunting, the main quest that was ACTUALLY interesting, better interactions) it was just GREAT. in my opinion, so that's where i keep wondering to myself how is that even possible that a game like bannerlord has NONE of it, instead of giving us more interactions with NPC'S and the world itself, it just.. well disappointing, it's just a downgrade in my opinion.(i have respect towards them and i love taleworld) but..are they even listening our suggestions? i feel like they completely gave up about bannerlord, and just focus on other things, i know that they update the game pretty often, but when i read the update it's just.. well "fixed a crash" and then something minor that no one asked for( i read it in steam..) while the things we want them to fix or add to the game is ignored, i do hope the game will get better in time, with more mechanics, more interactions so we could actually enjoy it more, i do enjoy playing the game but it feels like.. i am playing Warband with better graphics.
Besides that i am cheering for this game, it's a childhood game for me, and i don't want to lose hope so soon, so i will wait even if it takes another year or two, not like i am gonna die waiting..(i guess)