One thing that I don't think anyone has yet mentioned: The echo of NS5 in Horn's being asked by the Vanished People to speak for his race (humanity) just as Sev had to represent the whole of Urth. And of course he is honorable and generous and respectful. Something bad or sad is going to come of this, I think. We have been shown glimpses of some pretty distressing goings-on in this brave new world---the clerk in chains, for instance. The harem.
-alga
*This is WHORL, for discussion of Gene Wolfe's Book of the Long Sun.