5.2.1.1

[SeaFalcon]

Dispersion means it should be efficient energy wise. Current prims even with the 10% are not there. You tickle someone's shield a tiny bit while the fighter has more DPS.
Especially in group fights a Cruiser won't have enough energy left to screen off fighters because it can only fire 3 salvos due to having to spent energy on other stuff and then it's stuck to a measly 1.5 prim firing. All while a fighter has more than enough energy and can just fly circles with their fingers in their nose.

They went from completely useless and equal to not mounting any prims to, yay I can shoot an NPC that flies straight at me at impulse speed but it still costs me my whole core to drain their hull to 50%.

You're going to have to tweak a whole lot more if your intended purpose is to make fighters sweat a little when taking on a cruiser since right now all they have to worry about it not accidentally running into a heavy gun while prims are just eye candy for cinematic effects.