I just received my copy of Russia's Catacomb Saints
written by Andreyev (Part 1), taken from other sources, and then compiled and edited by Father Seraphim Rose.
This book was published shortly after the death of Father Seraphim Rose in a manuscript format.
In it, Father Seraphim shows how the Sergianist MP was corrupted and complicit in the martyrdom of many hierarchs, priests, deacons, monastics, and laity. From this book, one learns how Father Seraphim must have wept at the sheer brutality of the Sergianist MP church.
From reading his writings, I believe that Father Seraphim (Rose) of Platina is most likely a saint.
Strange, not too long before Father Seraphim's death, he was visited by Anthony of Geneva, who was even at that time, coercing and blackmailing bishops, priests, monastics, and laity to consider joining the MP. It was primarily Anthony of Geneva who spearheaded the move of the ROCOR to join the MP. From what I have read of him, I think he was a KGB agent as was most likely Anthony Bloom of the UK. (Incidentally, Vladimir Moss and his wife wrote about Anthony Bloom and a suspicious murder which occurred during one of his pastoral visits.) During the ten years that proceeded the MP-ROCOR union, whenever Anthony of Geneva visited his fellow hierarchs, an argument was witnessed, a death, or a capitulation to the MP occurred. It was just too coincidental.