I can see that, but I would've rather had a Borg v. Sisko: Round Two over just about any of the Voyager Borg episodes. When I think about it, I don't quite get that reasoning. For one, all Trek shows are in a shared universe so they should all have been able to use adversaries from other series, and to a great extent they did: Klingons, Romulans, and Cardassians primarily were used by all three shows. So, why not the Borg?
I could accept the argument that they were TNG's thing, if VOY hadn't used them, and used them, and used them. Conversely, I wouldn't have minded if VOY and a TNG film could've found a way to use the Dominion either. If anything, a shared threat makes it bigger to me.
Further, I wouldn't have wanted the Borg to become a recurring adversary on DS9, just a show or two to show Sisko getting some serious payback. Plus it would've been cool seeing how the DS9 crew dealt with them.