A couple of other things that Audition could usefully do with MIDI without being a full-featured MIDI sequencer -
send midi clock and midi time code
host VST instruments. No midi recording, no automation, just routing the MIDI from an external controller (or even sequencer) to the plug-in and recording (and allowing monitoring of) the audio stream. This would be great for those "this could do with some hammond organ.... oh wait, I don't have one" moments.