The thing I am worried about is that if you add an additional sensor that you hotkey, it messes with all brushes. I like how you can have control for each brush, but that comes with the downside of having to spend a lot of time to customise existing brushes.
Can’t you use the strength value instead? At least that doesn’t affect the relative values of other sensors that are in use. The custom sensir would add/ reduce or multiply values, rather than increasing/ decreasing their overall combined result more linearly (which strength does). If Hue doesn’t have a strength value, maybe it should get one. So adjust for the exception, rather than for the most common one.
So if I understand this correctly, you map this sensor to one particular hotkey per brush.
How would you incorporate this then?