Wow, haven't checked this board in yeras; glad to see it's comming back to life.
To add to the bannerlord mod recomendations:
-Developer console - rly useful for experimenting with different aspects of the game
-Detailed character creation - unlocks character customization options that I feel were intended by TW all along but for some reason haven't been officialy activated yet
-Custom troops template-tutorial; helps if you want to mess around with existing troops or items or if you want to add some custom troops to the game; but you'll have to get into the game's xml files. Fortunately it's as easy as it was in warband, and some stuff is better thought out imo, like being able to assign sets of items to every weapon slot individually rather than having pre-made categories of weapons.
Items are badly balanced now I'd say, but no point messing around with their stats at this point as I imagine TW will do it themselves soonish.
Regarding a possible E1200 mod or similar, I think the clan mechanic would offer a somewhat better way to simulate feudal relations so that's nice
On a negative note, having most clothing items take the color of the unit's faction is an awfull idea, everything's so colorfull now, and not in a good way, but that will prly be easily fixed.
Edit:
Also this.
https://bannerlord.party/banner/ Banner editor to get rid of the boring heraldry. The guy who made this tool also made a kingdom color changer mod that lets you change clothing colors on units,great stuff, my troops look ok now