presuming you are on pc (and yes, this doesn't answer your request for a mod. but it is what we have)
add this to the list: and those Rebel Clans, when they "succeed"... the player as a sovereign can not talk to them about being recruited into his faction. So unless they get randomly AI-invited to some faction, they sit around after becoming landless and the War Dec calculation mistake makes them want to declare war on factions, one by one and randomly.
I will gently suggest that you look again at what currently "happens". As of 1.0.3, observations of the marketplace loads, prices, and local price influences appear to be packaged preloads for all town markets. Might want to get TW's "economy Dev" in here for the current info.
Good Catch!