FYI - I have submitted a Feature Request into our tracking database to see if we can implement this in a future version of Studio. I definitely can't make any guarantees for our current development cycle, since we are close to when we release our upcoming 12.1 version. Hopefully it can be done soon thereafter.
Also thanks for the feedback I noticed in another forum thread that our 12.1 patch fixes a bug we had introduced with 12.0 where you were getting bad sound distribution after importing AC3. I'll try to find out what transpired, but as you say it's been fixed in the Beta patch we'll make sure not to allow such a regression to occur again.