The rewritten Famine definitely fits with Severian (and thus with the idea that this playbook could be a dark redeemer, not just a dick). No specific examples from the book come to mind, but one way you can look at the genesis of Book of the New Sun is as Catholic theology turned into something people at a SF convention would want to wear as a masquerade costume - so the idea of fasting as purification, inspiring people to give up their worldly attachments to better contemplate the ultimate, totally works for me.
(Another way to look at where the New Sun came from is that Wolfe sat down with the OED, contemplated all the possible ways the words therein could be combined, and one by one rejected all the ones that weren't perfect expressions of awesomeness).