I agree with you regarding the ROV trims but I wanted something quick at first and see what was really needed.
Adding ROV trims would require me to make a signal conditioning board. I would also need to use HALL effect Rotary Position Sensors and use a bigger box or sacrifice some buttons.
This would considerably increase the price of the controller.
In the meantime, there is a value in the software to adjust the CCW/CW sensitivity.
In order to use pots to control lights, you would need to use a system that is independent to the BR2 system.