Dan,
I understand you have a long list of feature requests. Is midi merge already on your list by any chance? I must use MIDI-OX for now to have midi merge, but it would be better if vArranger had the function. Thanks.
What do you want to merge ?
My master controller(s) would be a midi accordion, Korg Microkey 37/61(no sustain pedal), 88 keyboard, or any combinations of them. I definetely want to merge a USB midi foot pedal (MIDI Expression) to have at least sustain and expression. This way I can have sustain for the midi accordion and the Korg Microkey that do have a built in sutain foot pedal. Also, with midi merge or by selecting multiple midi inputs I can go back and forth between the midi accordion and 88 keyboard as my master controller on stage.