Lot of times, players command lot's of units in map view. Not being able to be there for every unit to see if all patches of terrain could be navigated and often units get stuck. Ai does give this flashing route marker if it gets stuck, but thats already when trouble has occurred. Reading SB maps isn't always easy either as sometimes some pieces of terrain are not passable that usually should be and visa versa, and such cannot always be identified from the map.
I wonder if it would be possible to have some sort of overlay that would show how AI sees the map? Like for example.. with "Red stripes the area that is not passable" and terrain object "rock clutters" includes to such as well.