Setting output levels between presets or scenes can be a pain. To make matters worse, guitars are imperfect reference sources to playback and hear level variations in output volume. I propose that a reference signal be added to the input blocks so we can have our hands free to make adjustments on the fly while monitoring the output signal.
The reference could be any number of things from a sine wave (probably not a great solution) to a prerecorded clip of a particular guitar. Imagine using the looper to record a guitar part, but it could be used across presets.
For this, we would also need a way to simultaneously monitor the output level WITHOUT having to go into the output blocks.