Re: LOL! seems like the "New" weapon systems on DS9 were not that grea
...It did appear that the station's defenses frightened three Cardassian warships to inaction in "Emissary" already - and drove away a Romulan warbird in "Visionary".
Of course, we don't know if these early defenses ever existed for real, or were merely what the enemy supposed must have existed. In the uncut version of "Emissary", we learn that most of the station's armaments were indeed a bluff, and in "Way of the Warrior" the Klingons are in turn convinced that the very real armaments are another bluff! It's possible Sisko didn't have thousands of photon torpedoes targeted at the Romulans in "Visionary". Then again, it's quite possible he did.
Clearly some sort of a rearming was a Starfleet priority in "Emissary" already: it was mere weeks (days?) after the Cardassians had left, and still the station sported one functioning torpedo launcher and some phasers, all of which must have held a priority in the Cardassian list of Things to Sabotage Before Leaving. If this sort of rapid fitting were possible prior to the pilot episode, then Starfleet could easily have given Sisko the remaining torpedo launchers (one or two per each of the six weapons sails, I suppose) and a load of a few thousand torpedoes within the remainder of the first season.
Timo Saloniemi