When using a VCA within a VCA, it would be great if the behaviour followed the parent/child nesting model.
For example. In my main drum VCA, I have sub VCA's for snare, kick, close mics, far mics etc. I add the sub VCA's to the main drum VCA so that when I spill the main drum VCA, I have my sub-groups all laid out. When I enter a sub group to edit, and then return (double clicking select on far right fader) it takes me back to my main page.