No rush, but I do have a device that does Mackie Control emulation but not MIDI. It would be nice to see support for these - if for no other reason than to see a motorized pitch fader and other controls on a DJ controller that followed the software.
Channel faders and crossfader probably wouldn't be a good idea, but I'd love to see the rest of it.
Like I said... no rush... just an idea I was kicking around.