By now the war has been going on several years. Rather than again updating the Drayman design to incorporate new technology, it was changed to accomodate a new mission. Now it is capable of transporting a regiment of troops, and defending itself against capital ships.
Finally, a major departure from the Drayman style. The command and cargoe parts are combined. The wing is still curved and ending in engines, but there's now huge fins. The engines still have guns in front, but the exhaust guides are no longer short and square but long and narrow, indicating much greater speed. And there's a honkin' big turret with a long-range heavy-duty gun. It's almost like the transport is now a frigate. As much as it is a major departure from the previous design, it was almost much more.