Is 2x fixed ballistic S2 really going to hurt anything significant?

While the weapon compliment is only one component in the overall success of any dogfight, similar loadouts on other ships designed for that purpose can often be more effective than on a ship with a specialized focus like the Eclipse. Here, they function more as deterrent, or tool to finish off a crippled target, than an effective fighting loadout. The Eclipse isn't supposed to be hanging around in a dogfight. This is a specialist ship with a very niche role: to deliver its devastating torpedo payload to unsuspecting targets.