TL;DR
Arrows on the screen edge pointing different objects and waypoints.What ?
Arrows, that points to (togglable in map options):- nearest car and tank (or all cars and tanks/last used car nd tank/ all cars and tank within range)
- labels and/or waypoints on map (all/selected/within range)
- alerts (within certain distance from player)
I imagine, that labels on the map may be regular label, or a waypoint. You can choose to display both or only labels on map, and both/waypoints/none as arrows on the screen.
If I go to destroy some alien bases, I (too) often need to look into the map to verify directions. I wish to set some temporary label at the map, and just follow the pointer...
Also, last used and tank may be pointed that way. Indicating direction to the current attacks may be helpful as well.