Nobody ever noticed the right channel was lower in the ESB GOUT stereomix ? I noticed right away when I listened random parts of it. Watching the waveform in Audacity only confirmed.
Perhaps it is due to downmixing then it is better to be left that way for a matter of equilibrium (that sould be easy to check if it "kills" the relief of the sound or not lifting the right channel).
-Edit: well, taking a closer look I'd avoid touching it.