Pre or post fader option for the headphone outputs

It would be great to have the option to choose pre or post fader for the headphone outputs. This is mainly so I can monitor the Main LR output in the headphones even when the fader is low or muted. I have the workaround which is to create a stereo mix that emulates the Main LR mix so that I’m able to have the Main LR master down or muted and be monitoring the Stereo mix but it means I have to sacrifice 2 of my output channels.