one of the things I notice is that you need a arm to salvage pirates, making the arm kind of really valuable. So I was thinking, could there be a way to salvage pirate vessels without an arm. Story wise, the difference between a derelict and a pirate vessel without remass is there is crew that will fight back. And I am assuming that is why you cannot send your pilot to a disabled pirate vessels.
so, what if you have a soldier type crew member that you can send to subdue the pirate crew.
Maybe every time they are deployed they have to take a month off to recuperate and repair their armor, weapons, and equipment.
maybe you need to send an engineer to patch all the holes too.