Steve, you really do get used to the icons in just a few days. They do show reversals and you get a feel for where you're at in a certain icon margin (200(250 or 350?), 400 (430 or 580?), 600...1000 etc.) You begin to see when something that had been steadily pulling away (2,4,6 etc.) sort of hangs on a number, its probably reversing or slowing.
Closer fights and faster reaction times. 10 lkill sorties are probably a thing of the past, but they should be - or at least extremely uncommon.