I would think that the following might have been an answer, but maybe just an idea for TPTB to toss around.
Under game rules. No Jumpship or Warship may safely jump with more than double its normal docking collar limit when using naval repair facilities.
At least then it's a rule that allows some abuse of the current construction rules w/o going overboard with the human sacrifices #P
At any rate, was worth a shot.