not shure exactly why you would want to see this ,, in essence its a safety net ,,
on the U-Mix Control Pro there is a little red led that blinks when you get the gain out of bounds ,, kinda the visual you are looking for ,,
not shure how subtle this feature is ,, try this to see the how it works ,,take a track with auto gain adjusted in one player and a track with the gain level jacked up,, mind you keeping a concern for your sound system ,, play and mix then with limiter on and then do the same with limiter off,, notation the gui visual action of the peak meter leds
with the tracks anylised for gain by the software the levels should be close ,,exceptions being tracks that have extreme level peaks in small areas,,this is where the safety net comes in to play,,,
suggestions as to how you would envision this repensation being set up in the gui