Nicholas, thanks for sharing! Feel free to share what you think an average person reading the book would find useful, and your article definitely comes in that category. There is also a Deep Learning community, which is more appropriate for everything related to deep learning not directly related to the book. But as a reader of the book, if you'd like to share something with other people specifically reading the book, please go ahead! :)
P.S.: I skimmed through the first half of the post, nicely done. I like that its accessible to the broader audience.