My theory would be to use an attiny to control pins 16, 17, and 18. Then you could pulse them 0-1 quickly to trigger the fv-1 to fetch eeprom. Hopefully there’s a more elegant way.
functionally, if just stomping to change eeprom could change the program, but not which patch # (1-8), and not the pots, that’s pretty limited function. So to me a fully integrated microcontroller system (pots, patch #, which eeprom) would be needed to get really useful stomp switch program changing (presets essentially).
Now we may be into territory the daisy seed would handle more elegantly, though it seems enthusiasm has slowed on that front?