There are a few small improvements I would like to request.
1: More LED colors, or finer control, it’s the only sort of display feedback the endless has.
2: Momentary mode for the left foot switch. The current long press latches and that’s not always desired.
3: Not sure if this is Possible with the current hardware but, persistent memory, so you can save presets that you make on the endless, not in code.
3: Make an Endless ProMax! that runs on the Mess hardware 
V2 hardware requests:
6 LED ring lit encoders with no stops and push buttons
Midi io
Micro SD Card slot, could be used for loopers/recorders
USB audio interface mode - (just a nice to have)
store and load more than one patch, currently have to load them in from a laptop or phone.
Display screen of some sort