I like this in concept, boxes that pass their product to another until it's ready to spit it out, but I'd like it to lean more modular. Not the way mindustry does it with having drone ranks.
Best option IMHO would be to make a drone of your own design, much like the ships. Then the number of drone parts would require an assembly line for that drone. You could choose to prefab certain parts and use them on different drones, so a prefab line could supply different assembly lines.
This way a drone ship wouldn't just be a carrier with launchers, like the missiles, but a manufacturing ship with a sprawling network needing crew. The assembly line would work like a modular weapon, sending out drones in real time, instead of having a bunch of preloaded launchers. There should still be options for drone hangars, but that should be the limited space optimal option, for smaller support ships, not for sustained fire.
If they could use existing resources, that'd be great.
HE for maneuvering, EMP for tiny shields, Nuke for energy storage, TC for speed, mines for kamikaze option, ammo for burst damage modules and steel for basic chassis. Mini ships.