It's difficult to give a correct time estimation, there's not a lot of stuff to do in order to release another test build but I'm currently on vacation and only work on the mod from time to time. I'd say we're good on the assets part except maybe the horses that I haven't paid much attention to yet. Other than that I need to update the noble troops trees and mercenary troops, finish some items stats and do a quick playthrough of the mod to catch potential bugs. We'll post some updates from time to time
I'm pretty sure there are some quest lines associated to Joan of Arc although I admit not having tried those yet