Hi @oweno
May I redirect your interest ;-):
In Korg nanopad2 with ETC - #6 by fanwander I pointed out how to change the ETC core to read all MIDI-CC’s instead of only five. May be you take this over to the EYESY. Also it would be cool if you feed more USB-ports of the Raspberry board to the outside. Then it would be possible to add hardware controllers directly to the EYESY.