I often have the problem that the difference in rhythm lead volumes might have to be as much as 4 or 5 db in certain venues and constellations. BUT when playing with inears that difference is really annoying. I sacrifice my ears and playing comfort because the difference is what is required. So in my in-ears often end up with being to quiet in rhythm sections and too loud for comfort when i play solo.
Here is my suggestion. The Headphone out should be capable of reducing the difference in rig volumes. It could be done by having a percentage control in the output menu. As an example if the percentage was set to 50% a difference in 5 db on the main outs would only be 2,5 db in the headphone out.
I am being totally serious when i say that i will pay you to implement this feature!!!!!! Name your price. 200 euro, 300 or whatever i will pay you!