It would have been much better had the Dominion been forced to find an even weaker player to be their Alpha Quadrant dupes.
I wonder. If the Cardassians hadn't offered themselves so readily, it would seem reasonable that the Dominion would have kept looking for
stronger allies, and might eventually have found some. Say, the Romulans, full of hubris about "handling" the Dominion.
The proximity of Cardassia to the wormhole didn't amount to much in the end. All the Dominion really needed was a base in Alpha where to prepare a decisively sized fleet to take the Alpha end of the wormhole from the Alpha side, after which the Bajoran system would essentially become both their bridgehead and their main base, as reinforcements poured through. The base for the preparations could have been quite distant from Bajor, as we remember that Bajor wasn't exactly surrounded by Federation or Klingon or Romulan territory or otherwise easily defensible. An invasion fleet could come all the way from, say, Romulus or Qo'noS or Thol or whichever ally the Founders picked, and proceed to Bajor basically unhindered.
Sisko was instrumental in finding a way to make Federation shields effective against Dominion weapons.
Where do we learn this? It might be that the ship he captured in "The Ship" had something to do with this, but that's sheer speculation. Just as probably, Starfleet R&D simply analyzed what went wrong with the
Odyssey.
The Klingons? The only reason they attacked was because they were Dominion puppets at the time. The devastation of Cardassia was done BY THE DOMINION to weaken them enough that they'd be easy to control.
Well, the Klingons did have that old Betreka score to settle. And they did seem to have superior guns; Cardassians have always portrayed as military wimps, an entire fleet of their biggest ships being no match to the
Enterprise or the pre-"WotW" , only partially upgraded DS9.
It wouldn't have taken much to incite Gowron into launching a military campaign, for reasons of internal politics alone. And the Cardassians would have been the natural target, both because they were so easy, and because they had acquired a new strategic significance as neighbors to the wormhole. The Dominion involvement seemed limited to whispering in a few already receptive ears, and doesn't seem to have entailed any "devastation" prior to the Klingon attack.
Timo Saloniemi