I think SE has always needed multiple weapon systems of the same type. And the community had been very vocal about the current Gatling cannon not being "BRRR" enough (like a C-RAM / A-10 Warthog). I enjoy the new sound of the gatling - though it's damage feels off.
But the hard work by the artists shouldn't be thrown out, just reapproached. This is a mock-up for a new weapon in the MG line. The HMG uses the original Gatling SFX to show it's "Tougher Punch". This sketch is my original design for a rotary HMG barrel. It would also be easily implemented by the Keen modelers by simply swapping out the Turret Barrel. Having multiple weapon systems also solves issues in combat depth and satisfaction.
In future, the Gatling could be updated with new firing mechanics: Low effective range, but faster RPM, velocity & damage. This would allow it to be a very useful point defense weapon for missiles + light fighter deterrence.
You'd want to clear the Gatling hardpoints from a distance - leading to some fun depth to combat gameplay!
This is a simple sketch / mockup on how to maximize results while minimizing the artist's development time :)