I want it to control a largish live MIDI rig as cleanly and simply as possible. Period.
I have no interest whatsoever in virtual instruments or living on my iPad. I need it to easily import complex MIDI files developed on a full powered DAW and make it easy to map the tracks to an EXTERNAL set of MIDI sound modules via whatever MIDI interface I have connected.
Seems I am in the minority (even though every gigging pro I know needs this functionality badly).