I reviewed Dr. Muhammad Al-Bahiyy's book, "The Quran's methodology in developing the society",
منهج القرآن في تطوير المجتمع، دار الفكر للنشر والتوزيع، القاهرة، مصر، ١٩٧٤
The book is not about abrogation per se, but the reader gets the impression that the author rejects abrogation by explaining that the variation between verses claimed abrogated is merely a graduation of legislation.
I started looking at the book, and your characterization is correct. In our terminology, the book is about the dynamic phase
of the religion.
However, it seems (not sure as I have just started reading it) that he is justifying
abrogation (and also not calling it abrogation) with this approach. I have seen different shades of that approach, where people seem on the fence and are either minimizing or explaining away abrogation.
The key issue has never been abrogation in and of itself, but rather leaving abrogated verses that are not designated as such in the Quranic script. In some sense, Al-Bahiyy's approach is similar to arguing against al-badaa
; he concedes the abrogation doctrine but defends the religion from possible attacks that are based on it.