Just for FutureVersionX:
On touch screen it’s way too difficult to do any tiny adjustments… however a wheel, like the trimm on a commercial airlines… or something like - but pimped - how A&H Mixer’s QMix mobile app appears:
Using that above with some productions and it’s designed to be super easy for tiny adjustments and can’t be missed… you can run app in “virtual” mode.
For sure would need to see a narrow VU and where the “current” fader-level is but on-touch only the wheel does the FADER function.