It would be very useful to be able to turn the MIDI Thru on and off using the hardware interface. I do not want to have to access the Uno through an editor to turn MIDI Thru on or off when I am using the Uno Synth without a computer or an iPad.
This will make it much easier to use with DAWless setups.
Edit: It could also be very helpful when using the synth with setups connected to a computer or the iPad as you currently have to access a second menu to get to the MIDI functionality in the Uno Software Editor.