I agree. Frankly it annoys me when the pathing goes around the AI's territory even when we do NOT have a non aggression pact. The AI certainly doesn't seem to have any compunction about walking through my land!
If we have to do that can we at least have a waypoint system where we tell it to take the first step in and then go to where we want it eventually? It gets bad when you have 20 pioneers that all want to go miles out of the way because the AI put one outpost in a key location.