This is an older comment, but I was wondering if you have ever delved deeper into his work.
I have used the techniques in some of his videos that are available on Vimeo, in addition to his books.l, such as the Art or Magic and the 22 Ammonian Keys, and I will say, after being someone who dabbled in several different forms of magic, including Golden Dawn style, the results I have gotten from his methods are superior.
His approach is completely different, and a lot of what he speaks about resonates pretty deeply with me personally. He describes his magic as being defensive, and specifically aimed at detaching yourself from the many forms of control, in this world and beyond, to arrive at individual freedom. I would still call it High Magic, but it is like nothing I have ever read or experienced.