It basically comes back to the age old request of not having separate mono and stereo (or surround) tracks - just have tracks which adapt as necessary.
Currently, if you have a mono track with lots of processing and automation, and you decide you want to add a stereo autopanner, you either have to recreate the track on a new stereo channel, or use a stereo group channel to work around the issue.
It’s not end of the world to do this, but having tracks that auto adapt would be cool - so a valid feature request.