Fast battleships could shift Italy toward fast light cruisers

How would four Francesco Caracciolo-class battleships affect Italian cruiser design?

Italy might place less emphasis on heavy cruisers and favor very fast light cruisers because the battle line already supplies heavy striking power.

The cruiser force would no longer need to compensate as strongly for the absence of modern fast battleships. Speed, scouting, and support for the battle line become more attractive than reproducing capital-ship firepower on cruiser hulls. The threat also changes British priorities by making 28-knot Queen Elizabeth-class modernizations more valuable than spending heavily on the slower R class. Fleet design on both sides responds to the speed of the Italian battle line rather than to individual ship categories in isolation.