Apologies if this has come up before (couldn't find anything).
What I would like is a proper 16-channel mixer showing what is playing on each channel.
I frequently load in MIDI files, move the melody to melody track and rest to soloist, and the mixer is frankly pretty much useless for multi-channel tracks. I have tried re-channeling stuff (e.g. melody to channel 4 etc.) but you often end up with channels you can't tweak in the mixer, or the mixer changes multiple channels at once etc etc.