I'd love to have a "Vel greater than 120" modulation source in addition to the existant "Vel greater than 100".
As an ex: just earlier I was trying to trick a Synth bass preset of mine into behaving like a trad slap funk bass, whereas hitting really hard at peak vel triggers a type of neo-slap sound (here delay turned down, filter drive and resonant up etc). I used the greater than 100 source. But that really cuts into the heart of the normal velocity range.
I could think of so many other fun sound design examples (think working with a trad sampler, like Kontakt, where one reserves that tip top vel layer for all sorts of nuanced and not-so-nuanced mayham/expressiveness/badassery).