This mod looks great!
Could you make each leadership point increase by 10 the number of the party limit ? And the same thing for prisoner management ? Then the player can capture more prisoners in early game and have a bigger army faster.
I wonder how kingdom's lords detachments will work. Will they be leaded by a captain or just lead theirselves ? Will the player have to put a captain to head his/her detachments ?
About economy, you could add some "caravan tricks" : When the player (or a lord if you can do it) meet an enemy or friend caravan, he/she force the caravan master to poison his supplies (the garrison of the town where they are delivered is wounded, the player lost honour. The player ask the caravan master to hide the player in his supplies, when arriving in an enemy town, the player enter in without fighting with guards....
Trading with caravans should be great too (they would be very strong traders, selling very expensive, buying for the lesser prices).
I read somewhere something very interesting : allow the player to make dry meat from fresh meat + salt.
May be could you give items some usefull attributes : having furs in inventory give a better rest when the party is in snow ; having wheat give some bonus to horses ; having alcohol give bonus point to morale ; having tools make villages/cities/castles improvements faster ; ...
I am a Native Expansion player and don't really remember if "weapons diversity" is in Native or not. I called "weapons diversity" something that give different statistics for the same weapon, I give you an example : You have a short sword that hit for 15 points ; when you loot an enemy party which troops using that sword you can find "broken short sword" with only 10 hit points, "masterclass short sword" with 17 hit points, "lordly short sword" with 19 hit points, etc... . That also works for horses in Native Expansion, and armours. May be could you add something like this. It multiplies the number of items without creating new meshes and textures.
I am so sorry for my poor English, I am French and I am to proud of my mother language to learn English effectively. At least, I can read it.