If you are a key player and need to make quick specific patch changes why not assign midi to those patches per song and change my hand?

Any patch can recieve any midi pc message you want, and they all have a save state of on or bypass per preset.

That’s how I do it on guitar at least. I happen to use to a midi capable footswitch for the majority of changes, but also have a key rig that relays it’s program change into the loop so the h9 changes in sync with that as well.