I agree, many of the observations in the early parts of the book are interesting and gives us a new framework for analysis of individual behavior vs sociotype. I do think his work require some mechanical explanation of all hypothetical constructions, a narrative to tie the story of the socionic mind together, I wish for a Freudian psychoanalytic reading of the material as well.
I see this as largely a Jungian interpretation of socionics, which is complementary to Freudian but is not focus on the same topics.