Yes, I add one Last point, but in some situation if "added" point is near first or near last change the optimization of points.

Example: if all waypoints are linear is good add one point near waypoint more far away from first.
Example2: if all waypoints are randomly located in country, is better insert new point near "start" point.

In some case make only one of 2 example can result in wrong optimization from mappoint.

I ask if someone have already try a similar solution and if can be good.