I don't know where you would be best to decide but I would say under filterpong or maybe modfactors tremolopan; I would love to run different effects into input 1 and 2, then have the expression pedal pan between those two inputs (as well as pan whatever effects the factor pedal was set to…)
another idea that is possibly the same thing… is arrange dual delay in this way, if I understand it correctly this pedal applies delay a and delay b to both channels, might sound cool to have delay a on channel 1 only and delay 2 on channel 2 and be able to expression pedal between the two…
