A bit late, but I just tried the new-and-improved Vulcan, and it is useful now. Two or more Vulcans are effective at point defense (and better at it than machine guns), and for some ships (mainly Dominator), I have been able to swap out flak cannons for maulers/HVDs/needlers and flux-hungry light ballistics for vulcans. Vulcans are also very deadly against unarmored targets. I tried a Lasher with Vulcan x5, and it can kill a Hammerhead with ammo to spare. In previous versions, I thought why use Vulcan instead of machine gun. Now, there is a reason.