Personally I think it would be a fantastic alternative to the GV dar if they could do it without knocking everybody's FR into the dirt.
I don't know how hard it would be on framerate, but I think as long as they were a finite length, like say 1000 yards or so, and disappeared when the guy died, it might not be that bad. If it were me, I might even consider no icons, just tracks for GVs.
Of course the crying from the tankers that don't want to interact with any enemy aircraft would be the stuff of legend.
Wiley.