I like the idea of some sort of sensor “fooler”.That's the way it is on 3500. Mine does the same as do many others. Some don't see any or near as much.
The claimed 2-3 in some videos are a reference to the 2500 with full air suspension.
You need to remember that the 3500 air suspension is supplemental, unlike the 2500.
The only real way to solve any of this is to go full air on the 3500, or perhaps a man-in-the-middle sensor fooler, like the pedal foolers that can be adjusted on the fly.