The standard tracker convention of presenting notes by the name (e.g. C-4, A#5) has a couple of key limitations, the first being that it is not always intuitive for when working with percussion instruments, and the second that it is not ideal in music where the key signature would normally call for flats rather than sharps.
Would it be possible to introduce a new feature whereby the note names that appear in the Pattern Editor can have a toggleable overlay on a per-track basis with user editable note name maps? For example, if I have a complex drum kit and I want to make it easier to see what notes trigger particular samples, I would like to be able to substitute say KCK instead of C-3 for a kick drum sample, SNR instead of D-3 for a snare drum sample and so on. I envisage the overlay being something that can be toggled on and off so that you can easily see what the actual midi note name is underneath. This should be a fully user definable feature, but it might be worth including an example with an overlay for standard midi drum maps. Keeping the note name overlay to a 3 character limit would probably be the simplest way to implement this.
Similarly it would be good to have an overlay for key signatures, so that if the overlay is on, flats in key signatures that have flats appear as they should. Another option would be to have an overlay that highlights when notes are in a selected scale or not (maybe by color coding??).