It’s not really clear to me what you are requesting, I’m afraid! I see a lot of context details, but maybe the request could be simplified?
Is it that you only want to monitor sampling through headphones, without the mix out going there as well?
I have a similar request Live Performance Feature: Pre-fader CUE here, but maybe it’s not exactly the same. Either way, yes, the HP out bus should have way more selectivity in order to be useful in the heart of a modern studio. That’s the purpose of such a bus.