I finished this recently. Really interesting end to the series. It was always on the cards that Kellhus would lead the Holy War to victory, hence enabling him to unite the known world fgor the upcoming apocalypse. What was interesting was his movement away from the Dunyain - as someone said earlier, he started to believe his own press after the events in the WP where he prophesised the result of the battle and then got hung up on the circumfix. The haloes are probably evidence that he's right in believing it too.
You could tell as soon as Akka started descrbing the Gnosis to him that he was going to do something funky, I didn't think it was going to be teleporation though. I wonder what other combinations he can come up with.
Stylistically, I didn't like how Scott changed to the much smaller character focuses in the end and did the rotation of POV. I understand it's a good technique for maintaining interest, but I don't think it helped for the Kellhus/Moenghus confrontation - I would've rather read that in one whole block.
Question: When Esmenet was possessed, how did Kellhus already know to protect Achamian?