I made further test for the docking ai :
Take off: what ever i set in the two ship's path , the ai behave exactly the same : hit walls at the same place (just 1/2m before the exit)
Landing : This time ai won't hit wall, that's really better : Only concern is that they do not bother alligning their roll axis and sometime land on their back

but that's better than default behavior.
Untill now, the only way i have to make them take off correctly is to make them appear "magicly" at the exit of the landing zone
or set a very very far waypoint straight forward to them and tell them to follow this path (one time by mission is ok but it's really not possible to do that on a whole mission.