Why New Zealand repeated an older turret layout

Why did New Zealand repeat an older 12-inch battery layout instead of using superfiring turrets?

A proven design was easier to cost and trust, especially for a second-class ship being built alongside larger capital ships.

The conservative layout made the ship easier to price and reduced design risk. Because larger ships were already under construction, repeating a known arrangement offered a dependable second-tier capital unit. The choice shows how budgets and confidence in existing drawings can delay a seemingly obvious layout improvement.