I think that the notation side of Sonar was sold off as Overture so my guess is that the right to change the code went with it (as well as staff).
other companies have invested in notation.. avid&sibelius steinberg hired the unemployed sibelius team, presonus bought notion.
Which leaves Finale as the only real possible deal maker/collaborator.
Unless cakewalk consider using Noteflight staff (Boston based but purchased by Hal Leonard).
I recall that John presented Cakewalk with a request after a thread debating this got quite fiery a number of years back.
We are now in 2015 and are still using pre 2000 notation editor.
I would like to have my note icons back.. (with touch screen that would be great)
I would like also some drum map dev integration with sample libraries' articulations.
Fact is, I never print scores and hardlu use my copy of Sibelius, but use the capable midi settings of Sonar to create mockups.
I suppose will always look with envy at developments at other companies.
But still harbour this daft feeling that every october/november that something might improve.
P.S. Chord track - excellent idea!
P.S. I would pay £100, £200 or whatever for more staff improvements