This is really cool!
Although most bands already have pedal boards which rely solely on sending MIDI, so they'd probably appreciate the ability to implement their current gear using foot switches or MIDI boxes which use 5din MIDI or TS/TRS to a USB MIDI host.
The USB host or MIDI box using 5din MIDI doesn't even need to be connected to a laptop for this to be possible, as I use the same approach to change presets on my Eventide H9, which is my main external effects unit that I have at home for my Xone 96 mixer.
If the Wolfmix could handle MIDI over USB, it would be possible for me to use the same MIDI box to control my external effects AND launch a Wolfmix preset of my choice, without touching the unit itself. Very much like your foot pedal solution, but without the inconvenience of having to use DMX merger boxes, which require mains power, rather than USB power.
https://www.ebay.co.uk/usr/xbox-one-modz
https://www.thomann.de/gb/switch_pedals.html
I know I keep going on about MIDI, but trust me it's the best solution for most consumers in the DJ/band/live performer space and there are SO many products out there for this solution.
The Wolfmix could even be a good solution for people in the streaming/gaming space who use lighting and a Stream Deck for example. Again, MIDI over USB is the way to implement this and make it happen.