Not a big deal in general. It's simple enough to use Sonar for my mastering.
But maybe sometime Bandlab might find a way for those of us who have it, to be able to use it in CbB?
Even if it required a user fee/purchase.
While working on a project i often use quick, unmastered exports for many purposes...
Subtle as it is, the different algorhythms are something i've become accustomed to.
As they're not for commercial/public usage at such times, it's not horrible to use what's in CbB now.
But it would be nice...