Sucess with Dain's Halls!!!
I feel like Doctor Frankenstein after giving life to his creature.
Now none of my settlements have pathfinding problems, all them are working very well. (That was the reason why KK did not implemented some of them).
After dol amroth, esgaroth, carn dun and dain's halls changings I think I can state that the AI can handle anything no matter how complex the settlement is, the point is just about adding inner walls on the city.
So layouts like the triangle pelargir are not a problem for us anymore.
Im stuck with minas tirith because Im trying to find a way to test it on the game, but Im 99% right that it will work (as I said, we can place the plaza on the 7th level now).
And Dain's halls gave me an epic battle in the tight corridors....