How autoloaders could reshape treaty cruisers

How would a deployable American cruiser-calibre autoloader change treaty-era designs and negotiations?

It would make US cruisers more capable and crew-efficient, while encouraging Britain to demand more and larger cruisers until it could field a similar system.

An effective autoloader entering treaty negotiations would give American cruiser designs a mature capability that rivals lacked. It could support heavily armed layouts, perhaps including four triple turrets, while reducing crew requirements. Other treaty powers would adjust their positions rather than treat the weapon as a purely American detail. Britain in particular would seek more cruisers and enough displacement to compete until it developed comparable machinery.