Hmm. I'm not a big reader or writer of fanfic (I keep my distance partly because I'm afraid I'll be Sucked In and never break free) so maybe I'm not the right person to answer this. But I do think CT is a very satisfactory conclusion to most of the strands of the series, and don't read AT or RAH much, so maybe you're right and that's why I'm not actually "desperate for more"?

Patrick/Nicola/Ginty is the one strand that is somewhat unresolved by CT I think, but then I prefer the way that it is left at the end of that book to the way it develops later, in RAH in particular.