Yeah, I'd seen headlines from comics sites about that. I want closure in canon though, and since Trek, even in animated form, doesn't recast characters, that means getting back Avery Brooks. Apparently he would come back for the right story. They'd have to do it right though, there's a lot to wrap up there.
So would Sisko, which is why he initially kept the cure to the Founder plague under wraps. But necessary or otherwise, I really appreciate that Deep Space 9 consistently treats them as evil. Discovery wanted to maintain an ambiguous relationship to them even when they were themselves responsible for the quadrant-ending threat. We're supposed to take for granted to some extent the rationalization that they keep everyone else's hands clean. In Deep Space 9, Bashir actively works to root them out and expose them, climaxing in capturing and killing a guy. He does estimate (with real conspiracy math used in the real world) that there have to be at least 70+ people involved in the coverups he knows, and we don't see him continue to fight them after he kills Sloan and saves Odo, but up to that point he openly treats them as an enemy, not a misguided ally. It's a pity he doesn't seem to have gone on to rat them out to the Tal Shiar or something.^This. Section 31 is something that you are supposed to dislike about the Federation. However, it also shows a reflection on yourself. Do you adamantly want them gone or do you accept that they are a necessary evil?
I would argue that they helped bring about the end of the Dominion War.