I'd say if Drake made a repair ship they'd make it dual purpose as a salvage ship too. They'd make a ship that could salvage the totaled ships and use the parts and scrap to fix up the other ships in your fleet and then chop shop the ships you attacked.I'm not sure that I'd want a solo salvage ship. Money making from salvage comes from removing in tact parts or selling scrap in bulk.
Since anyone can remove the parts and move them to their ship with hand tools, the Cutlass Black is pretty much already a solo salvage ship already.
I'd say, give us a smaller repair ship than the Crucible for quick fixes. Something that can pair well with a Caterpillar and quickly attach parts that the Cat brings.
Or give us a floating warehouse. Something Endeavor size but just one large internal storage facility. Nothing pretty, just functional.
Or possibly a pocket destroyer that the lore said that pirates use all of the time. One that carries a couple of Cutlasses just like the old Cutlass lore said.
I'm totally with you on the floating warehouse. There's nothing that has a single massive hold to move big things. I've said it before, Drake should make something that's an answer to the Hull Seize since the lore says MISC made them to beat out and one up Drake's Caterpillar as a bulk modular cargo transport. What Drake could do is make a huge flying shoebox of a warehouse with engines on the sides and crew compartments/bridge on top with a big door on the front and back that covers the whole face and opens the whole compartment like a tube, and with some smaller big doors on the sides. You'd have a cargo lift along with a ladder or stairs tucked in on the sides to move from the cargo hold to the crew compartments, something like the elevators in Grim Hex. It would also make sense to make them able to couple together like the modules of a Caterpillar, making it a perfect answer to the Hull since it's both big open internal hold that the Hull can't offer and it should have the same or slightly lesser cargo capacity than the Hull D or E, but could surpass it if coupled with more, but at the cost of buying more of these ships.