I'm 40. "Realistic" for me means that I need glasses to figure what's going on on the god damn screen !!!
And to argue against my proposal (
), I would say that a "LOS aid" would mean that the player would spend less time "studying" the map which is one of my favorite aspects of wargaming.
The scouting/recon argument is a strong one. But for a player playing mostly scenarios against the AI, "proper scouting" is in a sense "scenario sensitive". Unit mix, map size and duration can limit your capacity for even rudimentary scouting. (One more reason to appreciate good scenario designers).
The "LOS aid" could be used as an exotic way of introducing elements of the "digital battelfield" concept in the game (then it would be limited by time frame of scen, nationality,etc). Codewise may be difficult though...
And finally,
how does the AI handle LOS issues? Does it "know" where the good locations are, does it search for them or is it LOS dumb ?