Lo-Fi Games

Horses: You can buy horses for yourself and some of your units, with this, you and your group are able to move a bit faster also, depending on the current ratio. Also maybe a food supply system? Maybe adding a weight factor with items, causing people to move slower? They could store items on the horses to move faster too.

Factions: I like the monk faction being included, but what about some Armies of the nations at the time that control various trading towns. Also more weapon variations. Also being able to join these factions and settling new towns for them, you'll recieve loans or something.

Bears: Wildlife and the wilderness, add some animals for food or hunting. Which could be a good way to make money as an early game character. Also terrain to suite them animals. Such as Forrest. But forrests can come later.

theres already a weight system and different factions already control different towns, they are just static.

There is never going to be mounts, the game is intended to have some wildlife at some point and like the guy said above factions exist.