hey there! amazing work on this mod!
only flaw i met except the water making me crash once is that when besieging a walled settlement completely surrounded by forests i could not move my siege engine out of the trees to reach the walls, and if i tell them to attack directly the game fps slows to a crawl.
not a problem as i can just whittle them out with missiles then autoresolve, or siege until they sally out. but still, if you could find a way to at least leave a sliver more of cleared space in front of the walls that would make the issue manageable.

to add more details i had siege rams, couldn't place them inside the forest so i put them in a clearing as there was no space near the walls, they could move into the forest if i clicked on a possible destination outside of it, but once inside they are trapped and could not exit the forest boundaries.