Just to add that we already brought few improvements to Song page in 1.7.0 release:
- Add Empty Slot in Song Mode
- Copy patterns in Song Mode
- Pattern (on pad matrix) or track (in Song page) are now marked as non-empty when containing any of the following:
- Note
- Instrument
- FX1 / FX2
- MIDI Channel or CC
- FAD, CUT or OFF