Got the email confirmation that my copy will be available for pick up tomorrow.  The precious shall be mine!

Meppa is described as the strongest Cishaurim ever and yes, his fury helps fuel his strength.  He can certainly overwhelm power Anagogic Sorcerers, we've seen him do it and a Grandmaster is certainly not beyond his ability to confront (bring popcorn but keep your distance and shelter under a Gnostic Ward/have a Chorae folks).  Nor is he the only one to demonstrate considerable strength as we saw the Incandanti wreck considerable havoc on the battered ranks of the Scarlet Spires in The Thousandfold Thought.  That makes the Psuhke powerful, but it doesn't make it superior in potential power to Anagogic Sorcery let alone a rival to the Gnosis.

I disagree with your assessment.  The Psukhe does not overmatch Anagogic Sorcery, let alone the Gnosis.   Both Anagogic and Gnostic Sorcery work through language and meaning, accomplishing changes in reality either through more powerful and direct abstractions or weaker metaphorical tools.  The Psuhke does not use language.  What the wielder is attempting to accomplish is not set down using the rigid tools of utteral and inutteral phrases to fix meaning but intuitive and emotional projections.  The range of power that the Psukhe allows between individual wielders is greater than that allowed by conventional arts.  Eleazaras is clearly much more accomplished and powerful than an ordinary sorcerer of rank, but the difference between his power and that of the poor bastard Mysunsai sorcerer he overpowers is not as great as the difference between a Primary and Trinary.  Emotional power and intuitive understanding can vary considerably between individuals (hi Moenghus) , just as greater mastery allows greater power with the cants.  However, since executing sorcery requires sufficient mastery to understand the cants as well as sing them, there less variation between conventional sorcerous practitioners than there is between wielders of the Psuhke.  That's why Eli can fry weak ones three at a time with a single Dragonhead but the Incandanti can burn him.

I love the concept of gods rewarding those who struggle against them so you have the god of plague being worshiped by physician-priests.

Well, this was a goddamn cool part of the book. 

That nonman had to be pretty fucked up to get a death sentence from Cujara, but then he must have done something pretty awesome to get it amended by Nil-Giccas. 

The back of the book says his crime was sedition, which is something that does get you a death sentence.  This is a guy who was called "The Despiser" so he probably said a lot of things that made him enemies.  Kings don't like people saying they shouldn't be running the show and Cujara was "one who valued vengeance over mercy."   He probably hadn't offended Nil-Giccas nearly as badly, which is fair.  Cujara is the one carrying around the "I was tricked into allowing my enemies to genocide my species" card and is probably both more likely to receive biting invective and more sensitive to it.

I wonder if the Judging Eye can even see the No-God.  The gods, after all, cannot perceive Mog-Pheru.

That is to say, Ajokli is guess that fits the evidence. 

Is that truly Samarmus, or just one of the "fractions" Koringhus and Kellhus have, which he has tricked himself into thinking it's his dead twin?

That was my interpretation.  I argue with myself in my own head.