Blow up DS9? I didn't see that anywhere in the novel.
For what it's worth, in STO Section 31 is more represented as loveable rogue. The missions one is coerced to undertake in their name are typical "save the world" and one might wonder why we didn't receive the order from SI instead. Btw, in the Yesterday's Enterprise
timeline, S31 appears to fall with the Federation.
We're probably going to learn a lot more about them in Disavowed