Here is some more info on midi on Mixbus. I have played more with it, and while it works reasonably well, it is not really a complex midi sequencer. It is fine for adding some midi, but I do not see it replacing Sonar or even Studio One for heavy midi track routing. Then, today I just noticed that one of the Harrison tech persons just confirmed this over on their Mixbus forum when asked about midi workflow. This is what the Harrison tech said:
"Mixbus is not intended to be a "MIDI sequencer" or an arranger. Instead it is optimized to record, edit, mix and master "real" audio. However, even very audio-centric recordists "occasionally" want some MIDI and virtual instruments. Mixbus is going to work really great for that kind of person. If you're into film scoring, you'll probably want to use something else for MIDI sequencing, and then use Mixbus to mix the tracks into a polished deliverable." End of quote.
Again, midi does work (and works well), but I will probably still use Sonar for most of my more intense midi projects, but if I just need to add a couple of midi tracks here and there, then Mixbus sees designed for that. Perhaps others with more use of it can add to this, or correct this and give their experience.