I think that this would be a good asset to have when building missions.
when selecting the dismissed waypoint option it would be good to have another option appear in the waypoint screen like "Radius".
this could control where the units are wondering. so theoretically they will be within that area.
as I have noticed that the dismissed waypoint they wonder miles out of the area and just really defeats the purpose of it.
it would also completely randomize missions when this features used.