Indeed, aerial perspective that would work with HDRI, would be very appreciated. Current implementation is incredibly nice, since it reacts to sky turbidity and sun position and angle, but i think it would be helpful to have additional simple, entirely post-process "fog", that would work with all sorts of lighting and would not trigger IR restart. Something that you normally do in photoshop with z-depth mask.
P.S. can't wait the next build with fixed green tint issue, so i could give it a proper try.