What you're asking for is that Sonar staff view should become more like a notation software, where such customization is possible.
. . . but alas, Sonar's staff view is not that at all, it's more of a simpler staff playback / basic editing system.
So, yes, I'll agree I'd like to see what you're asking for, but there have been many staff view threads here, and it's clear that the development of the staff view to this level would be asking a lot considering the apparent lower percentage of staff view users.
. . . but please submit it as a feature request (this might yet get moved to the feature request forum, where users can vote to like or dislike), can do no harm . . . many staff view forum people will vote for it.