Maybe a bit more info about how I use multi-tracks would be helpful. I use one channel for click, one for drums, one for bass, then everything else on a final track and that is the track that goes to front of house. This is the track I would like foot control for. The click volume always remains the same for my drummer. The drum and bass tracks are only used for rehearsal when one of them cannot be there.
In the last 4 months, I have created 45 backing tracks to use for live performance. I'm sure I have now gone through what thousands of Stage Traxx newbies have, and it's been great learning. Now that the bulk of content has been accumulated and arranged, it's now the finesse of making the backing tracks sound natural with the band. That's where foot control of the single track, (or two track stereo for some), comes into play. It would become quick and easy to make permanent volume adjustments during playing on the fly without the band having to stop and start to recheck the change in volume for each song.
Not sure if this info is helpful or not. Again, thank you so much for your consideration.