Yes it is a issue that eucon can’t “use” the regular visibility handling to control what is visible on the surface. It’s a pity as it is quite a bit stronger than the “static” layouts using eucon.
Hopefully this can change eventually
But you don’t need to use a VCA to do this Keyplayer. You can just select two channels and issue show only selected channels. And remember that you can always undo a visibility change as a separate action. Quite useful.