The rorqual is a square peg going into a round hole. In this instance it fits because square pegs that are small do fit into round holes that are big.
The rorqual is the wrong size for where it can dock. Adjusting the size to be greater than a freighter, especially since the ore hold bonus now goes to 350,000 m^3 seems the perfect way to right-size it to being a square peg that no longer looks like it fits in round holes.