Alaska-class cruisers in the early Pacific battles

What if all American cruisers became Alaska-class large cruisers at the start of the Pacific War?

The answer expects stronger air defense and surface combat performance, with radar reducing surprise if commanders trust it.

Replacing every American cruiser with an Alaska-class ship would give early Pacific forces a much heavier anti-aircraft battery and more powerful surface armament. The Java Sea and Ironbottom Sound are named as engagements that would look different. Improved radar could also prevent some surprise attacks. That benefit remains conditional on commanders trusting and using the equipment.