Well, I still maintain (and have sent in the feature request) that a more 'musical' staff view would be useful. Something that takes all the notation, expressions, etc and can intelligently create editable MIDI CC's in that I could then further edit in the PRV. And maybe I could even make stylistic selections (jazz, rock, baroque) that would set parameters for how Sonar 'interpreted' those symbols.
Yes, I know this currently exists in Finale with the Human Playback engine and I use it. But as a compositional tool how nice it would be to have this capability right there in Sonar instead of having to create and export the tracks from Finale!
For score preparation I would still use Finale, I don't expect Sonar to become a full on replacement for that. But there are so many things I love about Sonar as a composition toolkit that I can't help but wish that Cake would just go ahead and make Sonar my one stop for composing!
So my suggestion is, just hire Robert Piechaud (designed the Finale Human Playback engine) and put all us notation geeks out of your misery! :-)