Please. When your cab/speaker, or the backline provided needs some tuning.
I know this has been requested before but I must do it again as I really see it as of great importance. The output eq is of little use as it is fixed and so broad. At the moment I have to use an EQ in the X-slot (where I would love to rather have a boost), and unfortunately the eq in that slot also affects all outputs, which I want to avoid.
E.g. my stage cab really needs a dip in the 2-3k area, but the output to FOH does not need it...
If only, just for the Monitor output!