Why was the Maximus Q turret not superfiring?

Why did the Queen Elizabeth Maximus model keep its middle Q turret at deck level rather than making it superfiring?

The model follows the Royal Navy's established five-turret A-B-Q-X-Y arrangement, with the mast and superstructure placed around the central mounting.

The model begins with a layout British designers already understood. Iron Duke and related ships provide the visual and structural precedent for the central deck-level mounting. Keeping that arrangement makes the counterfactual a scaled development of contemporary practice instead of a collection of every possible innovation. Design exercises are more historically useful when they preserve the conventions and constraints of the navy being modeled.