Thatsastrat
I have for a long time coveted the mastering section of Studio One.
For me, Studio One's mastering section is really a "CD assembly" section, which it does really well. It doesn't quite hit the same editing functionality as Wavelab or Sound Forge. I'd rather see SONAR go in more of a Wavelab direction, if for no other reason than because CD assembly is becoming less important in "the age of singles."
I always thought Studio One's integration of the mastering page with the multitrack page was really slick, but I think that would need to be integrated from Day 1 of the code spec...I assume retrofitting to an existing program would be difficult at best. However, I must say Mix Recall is not only the next best option, in many ways it's better, like being able to export multiple mixes and plug them into a CD assembly program without having to go back and forth between two program sections.