Innovations and discoveries here (including my own) seem largely pointless. It's a classic example of "you spent so much wondering if you could, you never stopped to think if you should".
The authors final section Does Notation Even Matter hits on the larger points I would make - ephemerality of voltage (tuning), difference in modular systems, etc., however it fails to make a strong case for the need to notate this kind of music apart from form(?).
It is disappointing to see these kind of regressive pursuits still enjoying any kind of popularity in avant garde music circles - they are experimenting with new and novel instruments, why would paper, out of all modern mediums available to the artist, be the best suited for notating this kind of music?