Redesign the boats under real German constraints

The closing exercise turns the class sequence into a constrained design problem. Viewers are asked to trace how the German boats evolved and decide what they would have changed. Any answer has to respect the Kaiserliche Marine's real disadvantages against Britain, including limited funding, limited construction capacity, and the need for both attack and screening ships. Simply adding more guns, cruisers, or destroyers with imaginary money avoids the decision the historical navy faced. The exercise requires armament, production volume, doctrine, and timing to be balanced together.