We have considered many of your opinions from the previous Foot Controller thread.
But it is hard to condense an optimal and (at the same time) compact design.
Here are two proposals again. The upper design is identical to the previous one, but includes a Looper knob (which was always considered to be on the board).
The upper is more logical, the lower more compact. Which one do you like?
Looking at the drawings, I get the feeling you are planning a design where all switches are on the same height level. I would kindly suggest to create a pedal in a way so that all the rows would be on different height. That way there would be smaller risk of accidental switching of wrong buttons. Mis-aligning the switches would also be a good idea, again for making it easier to hit the right switch. How Behringer foot pedal is designed supports this idea, although the build quality and programming difficulty makes this pedal not that great. Yamaha MFC10 is also similar by design, G Lab GSC-3, Roland FC300 too... Fractal MFC 101 looks very good and robust, but could made better by mis-aligning the switches. I'm new here, so pardon me if the topic has been previously beaten to death. I'm sure whatever you release will be great with KPA!
EDIT: One more important thing, please don't share functions of the tuner switch! Tuner must be accessible very fast. Sharing a function, holding and waiting while it activates is not good at all, often we only have 2 seconds on stage to check the tuning and if that time is lost while waiting for the tuner to start we can't use it and need to rely on another device. Thanks!
Another EDIT: Any midi controller would work with KPA, but Tuner function would make this device a must-have for every KPA user, so... please, make it very good