+1 on doing something for the visibility in DCS.
I don't know if bringing back scaling is a good idea though, reading about it above. I'd rather see a more thought through system.
I run a 3440x1440p screen, and I have trouble seeing other aircraft. Mainly because of the one-small-pixel problem, but that is also enhanced by AA making the few pixels I see blend into the background. That can make somewhat realistic sense on longer distances, but for close distances, it's kid of bad. For me contrast on the pixels representing other aircraft is the main issue. If they where darker (and not blended with AA - I force it through the Nvidia control panel (maybe I should stop doing that...)) then I'd see them easier. IRL I have no issue spotting a relatively small aircraft at about 6nm, but in DCS I'm practically blind (I can see larger a/c, like the A380, at more than double that distance).
I'd also suggest a cut-off ranges where aircraft are not rendered. Tankers and other big a/c should be seen from longer distances - smaller could have a shorter render ranges.
Another issue that would have to be considered with a rework of this would be navigation lights. In dark conditions, I can spot a/c's with nav-lights from more than 10 miles off, no problem. in DCS, they are not visible beyond 1 nm.
So many issues here -.-'
//Jarl