This book is...confused. It wants to simultaneously leave things to the interpretation of the ST by saying "maybe this is a Progenitor scheme!" but having the PROGENITORS say that is quite odd. The in character sections should know, or at least think they know, if their own organization was involved in large scale actions. It also has the nonsensical idea that the Progenitors are somehow killing Avatars on a mass scale, which would mean no more Progenitors.
The book has some good parts, the story that the basics of the Progenitors are conveyed through are the notes of a student, though a super-unsympathetic one, who seems on the verge of going MRA terrorist by the middle.
In general, it's an ok book, but it shows badly how early in Mage it was written, before much of the setting and details had been nailed down properly, and while it did some of the lifting to make the Technocracy more than a one-note black hat, it left a LOT of work to be done.