Have any of you ever seen the AI use interceptors? As in the role? I haven't so I'm a little confused as to why you'd arm or armor a cargo carrier (support)...
I load them up with assist modules or sensors and one carrier module.
Doesn't hurt to have armed cargo carrier designs just in case, if and when Frogboy overhauls the ship combat portion to have the AI actually take advantage of the ship roles feature. Defenses are pointless since carriers are already SOL if it's their turn to take hits, but weapons might conceivably be useful now, or in the future.
Besides, it's not like Interceptors can actually carry out the role of hunting Supports like they're supposedly intended to, even if the AI used them. If this ship guide is still current, Interceptors would have to take out the opposing Guardians... and then double back to wipe the opposing Escorts before they can proceed to finish off the opposing Supports. That means Guardians are obsolete in their intended role of protecting Supports, since Escorts can do so just as well and better. Yeah, I think that's kind of stupid too, but that's the game for you, what can you do.
For me, the key to using Guardians is what their targeting priorities are if there are no enemy Interceptors around; Assault. That means while Capitals might be preoccupied battering down the enemy Capitals or Escorts, Guardians might actually have a use in clearing out the enemy carrier Assault Fighters.
That's why I designed a Huge Guardian carrying 4 Guardian Drone modules; it's the best idea I can think of for countering carrier fighter swarms, while avoiding the overkill issues that Large/Huge Capitals/Escorts suffer dealing with them. Of course, it's still just pure theorycrafting, I haven't actually had the opportunity to test it out in practice yet.