Eight-inch proximity fuzes for County-class cruisers

How would eight-inch proximity-fuzed shells for County-class cruisers have affected the war?

They could break up and damage air formations at unusually long range, although they probably would not save Dorsetshire and Cornwall.

County-class cruisers that retained 70-degree gun elevation could use their eight-inch guns against aircraft. With radar control and proximity fuzes, those guns could send shells into Japanese formations before the aircraft separated for their attack runs. Bursts among aircraft still flying together could disrupt the formation and destroy some attackers at ranges where they did not expect the cruisers' heavy guns to engage them. Dorsetshire and Cornwall would probably still be lost during Operation C, but the hypothetical weapons could increase the casualties they inflicted before sinking.