The saved Lion design is already overweight even though the class has not yet entered service. Research on the technology tree can change the weight of components fitted to an existing design. A ship that was balanced when ordered may therefore need another design review before commissioning. The moment turns a frustrating game mechanic into a useful illustration of how technological change and long construction times can make a nominally new warship arrive in need of modification.
Notable Point · 51:33-53:24
How research can make a saved warship design overweight
A battleship design becomes overweight before entering service, illustrating how new technology can invalidate an apparently finished set of calculations.