Dumb idea. In ZBrush there is a small popup menu with some of the most commonly needed controls like brush size, add/subtract, etc. It is triggered to pop up by pressing a keyboard hotkey. The menu appears underneath the stylus tip.
In Clip Studio Paint I have set up something similar using the Edge Keyboard and the quick access menu.
Right now in Nomad Sculpt I have to use both hands to use the stylus and adjust brush size, brush intensity, symmetry, dynamic topology, smoothing, masking wireframe, voxelize, etc.
What I am suggesting is one or more screen edge buttons that brings up a minimized button menu underneath the stylus tip when the button is held down. The menu could contain most used commands or commands relevant to the tool selected. I’d suggest the obvious like:
Brush Size (slider)
Brush Intensity (slider)
Last Brush used
The whole idea would be to minimize distractions and make it faster to access commonly used commands.
Just an idea.