I believe it is possible that the founders of the Dunyain lied (we know they did about sorcery, which they must have initially known of) to their later followers about specific things in order to 'prepare the ground' for the coming of Anasurimbor Kellhus, including exiling Moenghus for reasons that were never even mentioned.  And honestly, you believe Kellhus was 'unprepared'?  Even if he was the path he took was not - Moenghus contrived the holy war with his world-born son Maithanet simply to deliver Kellhus to Shimeh.

The way our system of education is set up its no wonder kids come out of school without motivation.  Instead of nurturing our native curiosity as children, cultivating our ability to think independently and collectively through open group discussions, the majority of modern educational systems force feeds 'answers' that we are expected to memorize.  Having our earnest questions repeatedly dismissed as children leaves us rather cautious as teenagers and downright hostile with suspicion as adults.

The Celmomian Prophecy (Hmmm what a strange coincidence that it involves Kelmomas' name sake, remember the different spelling is just due to transliteration) says that "An Anasurimbor will return at the End of the World". However, as is pointed out by Esmenet in the Warrior Prophet when Achamian first tells her of Kellhus...if Kellhus truly is an Anasurimbor, then there has always been an Anasurimbor in the world. That's not a return of any kind.

So I'd have to disagree with the contention that Kellhus' appearance is made irrelevant by Moenghus.  Kellhus came into the crusade for Shimeh using his original name and telling everyone he was a prince.  Moenghus by contrast seems to have made little to no impression as an Anasûrimbor.

Also Kellhus has been much more prepared as well as having had the holy war set up for his benefit (he walked a large tract of 'prepared ground' toward Shimeh), and this confluence of events suggests to me that he is the harbinger of the Kelmomian prophecy.

And maybe the Dunyain are merely the keepers of that prophecy, a group which conditioned itself specifically to produce Kellhus Anasûrimbor and the circumstances of his Ordeal.

How about the Dunyain are keepers of the Kelmomian prophecy?  Set us to ensure both the survival of the Anasaurimbor line and that the harbinger of the Second Apocalypse would be capable in every way possible.  This brings up an interesting question: why was Moenghus exiled to begin with??

I'm not so certain the thousand temples has to be wrong for Fane to be right, just because they are two religions at war.  The fact that the Tusk outlaws sorcery (an Inchoroi plot?) and that sorcerers with no mark make up the priesthood of the Cishaurim suggests that the Cishaurim are actually not sorcerers at all.  It seems to me that the realization of the solitary god is not so different from how the nonmen escape damnation (worshiping oblivion or 'the spaces between the gods'), as worshiping the sum total of all the thousand temples gods (who are 'aspects' of the one god at war with himself through us and thereby preventing aforementioned realization) you can safely assume this means worshiping 'beyond' the Gods - an attempt to grasp the underlying foundation of all reality - and perhaps this is what drives the Psukhe, nothing less than a foundational meaning for existence.

Also I don't think Fane was Dunyain - it contradicts what Moenghus told Kellhus about the Psukhe.

I do believe that adults have a harder time grasping new languages.  Their minds are cluttered with much more, and their brains are less plastic.  Evolutionarily speaking it makes a lot of sense for children to be better at learning in general, as they have everything to learn.

I'm not certain Meppa is someone from the past that we knew, or maybe a lesser figure that only now plays prominent.  His assumed amnesia certainly suggests he is a familiar, but who?  My first guesses are almost certainly wrong - Moenghus, Cnaiur, Xinemus - all dead with little ambiguity, except for Cnaiur who was decked out in scars.

My money is on Meppa being either new or an old lesser character.

What strikes me as important about the Cishaurim is the fact that they have found a way to use sorcery without the mark.  Keeping in mind what we learned in the Judging Eye this is nothing short of a miracle.  I believe that they are of the Few, although this is just speculation, as if they weren't I'm not sure what would keep their numbers so low. 

Meppa is even more of an enigma than the Cishaurim themselves, as even he doesn't seem to remember who he is.  I feel like there is a lot of potential for fan fic with the Cishaurim given a little creative availability.