I find that I very often need to change the mix levels for reverb and delay when I go from my studio to when I use my KPA live. And I almost always have to change those mix levels going from one live venue to another. Therefore it would be extremely useful and time saving to have a global mix control for delay and reverb that would decrease/increase them proportionally.
And now that I've got the powered Kabinet, I would also like to have those global controls available separately for the Monitor Out. Just like there's a separate eq for the Monitor Out.