That's partially why I'm against the concept of the Mk.II program, Daft.
Having the weapons have similar damage is fine. Reusing the assets is okay. My issue is when you reuse the assets and then make it a completely different weapon.
For example, Richard's idea for an Impact Carronade. Historically, it makes sense. I don't fault that. But a noob is going to grab the Mk.II and mean to grab the Mk.I, or else grab the Mk.II thinking it's better than the Mk.I at doing the same job, and be sorely, sorely mistaken.
If the guns do the same thing differently, there's no contest. Mk.II flak really shows this off. Same deal, different execution.
Meanwhile, we have the new Mk.II Aten that they are testing that is simply disappointing they would even try it. A laser shotgun. Who can I skin?
If you're going to make different weapons in the same style, change it to being a family, not a level up change. Flak family, Lens Array family, Carousel family, stuff like that. It may seem like a semantics change, but it's not.
Banshee is the base-line, correct? What does a banshee do? Fast firing, fire and explosive, causes a lot of fire. Keep it that way. Just change how it does it. Perhaps make it fire multiple rockets at once, or else fire fewer rockets at longer range, but keep the base of what the weapon is.This is what it did, this is what it was, this is how it was changed.
With that in regard to the Alliance weaponry, it could quite easily be taken and utilized. How can we do the same job, differently? How can we make this efficient but not too powerful? It's not difficult to think up some variety to do the same deal. For example;
Aten lens array, possible variant change; Delayed fire with a short burst at max charge. Extremely powerful, but long reload.
Ferbruus weaponized coil, possible variant; an automatic firing weapon, sending out a bolt of lightning at a slow but steady rate, like a lightning gatling. Have it arc between the components rather than arc between ships.
Seraph Variant; Single rocket at longer range, but with a significantly increased explosive power, but much slower speed.
Kalakuta gas mortar variant; Small clip, as well as a smaller AoE, but with the damage much more highly concentrated, and a very high chance for fires.
Just keep the spine of the weapon, what it's supposed to do, then let it do it in a different way. That's all needs be done.