To be frank, Appelcline's review is (to my mind) one of the least helpful takes out there when it comes to understanding Dave Arneson's True Genius, simply because it only offers modest information about what's there in favor of critiquing the book for how much it goes against Appelcline's beliefs with regards to the development of the hobby. Hence his use of terms such as "Arnesonian revisionism" and "Chainmail denialism." He sees the entire thing as -isms that refute his version of history.
So I've tried, twice now, to avoid the topic ... under the theory that if you have nothing good to say, say nothing.
But that said, Appelcline's review is, in my estimation, generous. Shannon states that, "I found the booklet almost unreadable." I probably would not have used the qualifier, "almost."
I do not have a lot of regrets in life. Choosing to watch Dexter after the first few seasons (and definitely after the Trinity season)? Yeah, that's a regret. But another thing I regret is spending any money on this little booklet. If it had been free, it would have been overpriced; as it was, I recall finishing it and thinking to myself, "Self, I just spent $30 on 70 pages mostly gibberish." (The amount is approximate, but it was insane for the booklet).
If you want to find out more about the history of the hobby, this isn't the book for you. If you want to learn more about theory, this also isn't the book for you. Rob Kuntz is a person who has done a lot for this hobby, and that should always be respected for those contributions. But if a person's past was a 100% reliable indicator of quality, then Cyborg Commando would have been the bestest game ever.
In my opinion, the problems with this book are manifold and manifest, and while I am happy you found something in it, the banal observation that Arneson was running a free-wheeling game that Gygax had to, you know, write down so people would buy it hardly qualifies as worth the the effort, especially when you add in the incomprehensible gobbledygook that he tries to couch this argle bargle in.