Quick sketch of a new ship system:
The 'space marine' system launches a huge number of tiny 'drones'. This is basically a whole platoon of Batavian marines (around 25). They obviously do not regenerate. Dead is dead. The marines wear special powered spacesuits with built-in "jetpacks". Basically a personal ion thruster, or PIT. They come armed with a "minibus": a smaller handheld Donderbus.
I'm still fleshing out the lore on these marines and their special spacesuits and PITs. They will probably have a secondary weapon. I am thinking along the lines of an EMP grenade that they may throw once in close range of a target. Alternatively they may get a cutting beam for close range attacks (see the secondary barrel on the 'minibus').
They will be too slow to intercept missiles or fightercraft. Instead they are designed to slowly swarm a certain vessel and begin to damage and disable it. They are also easily killed, hence the large number of marines.
If you are wondering about the EMP grenade, it would basically work like this: The marine throws it toward a target. The grenade will slowly drift toward the targetted ship. Then it lodges on with grapplers and detonates.
Here's the actual sprite: (five in a row)
Advantage of the marine platoon: Lots of little armed drones
Disadvantage: The marines can not keep up with the ship that deploys them. A good commander recalls the platoon when on the move and only deploys them in a combat situation. So some tactics are involved. After all, they aren't proper ships. They are troopers in space suits. Hence they are slow to move about in space.
[edit]
"A platoon of Batavian marines stands ready to clear this ship's bulkheads. Armed with minimeyers (smaller versions of the C-12 Hazemeyer) and wearing powerful armoured spacesuits equipped with PITs or 'Personal Ion Thrusters', these marines slowly make their way to their targets to disable or destroy them. Such a venture into the void of space often proves more hazardous than piloting a Fokker strikecraft. As such, these marines are heralded as true heroes among their crews."