You have probably seen the MIDI controller already being marketed that mimics the layout and function of the Factor series stompboxes. I prefer your design with its additional features. I would respectfully suggest making the MIDI Channel 1-2 switch a 5-way rotary for Omni, Ch 1,2,3,4; and expanding the layout to five footswitches in two rows staggered to mimic H9's two plus three aux switches. (Most important footswitch functions available at all times are probably Bypass, Tuner, Preset Up, Preset Down, Performance/Hotswitch.) I did a concept drawing of a similar controller for ET pedals to use those controller boards a while back and you are very close in design and fully executed, so bravo!