Basically, I was thinking, perhaps it’s possible to change brush presets and such through Left/ right movement to decrease/ increase the settings respectively. Something like that might also be applicable to the “Rotate an HDRI addon”. I see why you want to set this using the preferences, but I understand you can still set a different direction in the keymap and use that regardless of the preference direction method setting. Isn’t that confusing? Maybe add a tooltip that this is indeed possible?
In Krita, there now is an addon to dynamically change settings/ slider values by moving the mouse/ pen:
It works great and I think it would be neat to do this too in Blender. That’s why I’m asking about possibilities. Perhaps a similar Blender addon could be made for Blender in the future when your directional patch is accepted. 