G3: engineering elegance versus fighting arcs

What is the objection to the G3 battlecruiser's unusual turret position?

Its gun arcs are too compromised: it contributes poorly forward and cannot effectively cover the stern.

The amidships turret cannot contribute well forward or cover the aft arc effectively. Concentrating machinery, armour, and guns may be elegant on a drawing board, but the restricted arcs reduce fighting value. A capital ship must be judged against pursuit, withdrawal, and broadside engagements rather than internal compactness alone. The G3 combines engineering ingenuity with a serious operational weakness. A Nelson-like revision might look attractive despite creating other weight and layout problems.