Moreover, not only the small entry in backstory in the WC2 Manual states that the player character met fighters that seemed to vanish, but we also see a pair of Strakha briefly uncloacking near the Claw and launching torpedos at her in the game opening.
You don't see it in the game, but the Epee is supposed to be able to carry torpedoes.
(Why one would do so is beyond me... but that's probably a subject for the Epee thread, elsewhere in this forum. )
The Strakha in WC 2 do carry torpedoes and so we can assume that they do in the intro as well. And the Strakha already is incredibly slow - 320 kps (though it has ABs).
And mounting six torpedoes on your Sabre didn't seem to affect the perfomance.
I find it, EXTREMELY hard to believe that the designers of the Epee ever intended it to carry a torpedo.
It's amazing how much people can read something into one throw-away comment from the game, and determine what the fictional ship designer had in mind. All we hear is that it can carry a torpedo. That's it. We don't even see it in the game. Anything else is wild speculation fueled by personal opinion.