Beam has been pushed to 30 feet. Boats need crew and fuel. The drawings show the transoms clear of the waterline with about 28 inches of overhang aft, but the photos show the transoms immersed with the boat at rest. In fact, this situation appears compounded by the fact that 2.5 feet were added to the stern beyond the original designed lines. Presumably this was an effort to get some counter and lift the transom clear of the water.
Cats do get heavy aft.
Cat interiors are challenges. You have two skinny tunnels to fill with sleeping accommodations connected by a small meeting hall. Berths will fill the beam of the hulls, which pushes the berths into the ends. The volume left in the center portion, between the berths, can be used for lockers, heads and, in this case, a workbench. Note that the engines are located below the workbench.