Separate keybinds for each note throughout all three octaves is super necessary. Playing a song that dances between octaves is harder than ever before, but that could be solved by expanding on the performance keybinding screen, allowing -1 and +1 octave notes to be bound to keys at our leisure. The UI of the piano keyboard could remain the same, and using the octave modifiers could operate the same, though an even better addition would be to span all three octaves on one window, or layer them on top of one another like a pipe organ.