Holy cow. About 20 years ago i wrote a similar proposal for "improving" notation. My primary aim was for easier sight reading. It didn't go as far as yours.

Holy cow. About 20 years ago i wrote a similar proposal for "improving" notation. My primary aim was for easier sight reading. It didn't go as far as yours. But three key ideas where: * Add 1 line before bass clef (E) and one line above treble clef (A). That way, both treble and bass clefs become the same (EGBDFA). There's really no reason for your brain which just learned that the 3rd line on the treble clef is B, to suddenly be D on the bass clef... WTH?! This way, the 3rd line is /always/ B! * Make note-head shapes include its flat/sharpness. Again, there's no good for your brain to have to remember that F is reaaally F#, or be scared of that key sig with 6 flats. Instead let's say a round note is natural, square is sharp, triangle is flat (or some such). Suddenly the note-head /shape/ carries all the info needed for immediate recognition and no on the fly translation is necessary. * (less radical idea) A third one is writing piano music vertically, like japanese. Why? Because the piano keys are vertical while the music is horizontal. If you turn the music 90 deg clockwise, from left to right the keys match up with the notes from low to high. Of course if you're a naturally good sight reader, none of this stuff matters, but my gut feel says these will be improvements for new comers.