The reason why one can move Video and the Audio separately is because...
What layer the video is on makes a difference. ie. vIdeo has upper layer dominance.
Audio does not care what layer it is on.
It would be far more inconvenient if audio tracks moved up or down when one moved the video. How would it know where to go?
I understand that side of it, its a feature which I was used to in FCP and now I dont have it so was wondering if CC has this feature.
In realation to audio not caring what layer it is on you are correct but if I want to shift it with my video to a different layer it is a labourous task when editing under pressure in time sensitive situations eg onsite VNRs for events where you have to have ambient bg or when you want ambient from b roll over talking to have to shift it down separately before moving your clip to avoid overwriting exsisting.
Premiere is strong on Track Targetting workflows.
I have keyboard shortcuts using the numerical keys [video toggle] and shift- numerical keys[audio toggle]
There's supposed to be a keyboard modifier that allows this when dragging, but I never could get it to work, and I no longer recall what it was. (Not even sure if it's still there in CC.)