Surely the setting up of new DS9 novels could have been done in new DS9 novels? If those threads set up in RaD are not resolved in Peaceable Kingdoms then the whole novel is basically a small short story about an assassination. I feel annoyed thet these plotlines were to be resolved over The Fall in general, let alone setting up future unconfirmed series. The other Fall books were fantastic, and self contained.
Any relevance to The Fall? We'll see in the last book.