I know that I'm just preaching to the choir, but *please fix* this path-finding issue. Overall, this is a *great* game and one of the best launches PDX has ever had (and I've been playing PDX games since the OG EU. I remember when I had to edit the game files to give my nations cores), but this is just brutally bad.
As an example, I left a game midway through a crusade for Jerusualeam to write this post. We were winning handily, and had most of the kingdom sieged down, when suddenly 12k Christians pitched tents and marched into the deserts of the Suez. I followed, not wanting my own 2K stack left out exposed, and realized the AI was chasing 2K down and around the Suez mountains into Egypt (without catching them). Then, when they got to Egypt, instead of walking up Gaza which we already controlled and relieve an ongoing siege, the entire army *embarked* and sailed to Lebannon, where they were promptly met by a 14K stack which smashed them, thanks to the recently disembarked penalty.
Literally *none* of that makes any sense:
1 -- Lift sieges of the war target to chase down an inconsequential stack that *should* be hidden by the fog of war.
2 -- Run in mountains and dessert, over forts, taking attrition all the while in a futile attempt to catch a stack several provinces away.
3 -- Embark.
I don't use this phrase lightly, but it's actually a game-breaking issue. I had to stop an HOI IV campaign because of similar AI issues of allies loading up on a front after a naval landing and eating up all the supply, which made certain nations virtually unplayable. After that experience, I have not gone back to that game (or bought the recent expansion), as I am waiting for a fix on this fundemental issue.
Paradox, please don't do the same thing to this wonderful game -- which, to be clear, is *otherwise* great.