I didn't know there were a MIDI controler for H9. Do you have a link, I'd love to compare with mine :).
Your suggest are good. In my case I use the stompbox on my pedalboard so I don't need to have active or tap button. Nevertheless I have customise my volume pedal like a wha wha. when pressed, the volume pedal becames an Expression pedal. Handy for the whammy (pitchflex) preset :).
Thank you for your message I appreciate.
(Are you french ? ;))