All Cargo ships have a crew of 12 regardless of size.

This is using an existing U3 Save after updating to U4

I'm pretty sure that's a part of the re-balance of ships.

It also has to do with the fact that if you use less than
all of the available modules on a ship, it will only use
as much fuel as how many slots in the ship are used.

So all ships with just 1 module used uses
the same amout of fuel as others doing the same thing.

This is like a continuation of that (you only need
12 workers to run any ship).

Not intended, sizes will be restored to 12,22,30,36