It would help with ability to balance sections (drums vs vocals vs instruments, etc.), and it would make solo-ing aux channels in post fader mode possible.
Just 4 mute groups, on an optional channel pop-up, and the controls on the Main Mixer view would be it.
Not a deal breaker if it’s not possible. There are ways to do the same thing (creating submixes or groups), just a more convient way of doing it.