Nice drawing, but it seems outright strange for a late forties-early fifties destroyer to only have two guns and in the stern no less.
Useless for a 1948-1950's
ASW western ship to carry 4 to 6 large guns (100+mm), because during this era, the main (soviet) threats was attacks by soviet subs, light forces (MTB), mine and aicrafts. (soviets cruisers/destroyers was expected to remain in harbor, due to very large US/UK fleet dominance)
A twin 102mm was clearly sufficient to deal with a surfaced russian sub and a mix 40-102mm battery was well suited againts MTB.
The only major weakness was the inability for the 102mm gun to deal with modern air threats (this mount, designed by early 1930's, was clearly too slow (
in speed elevation/movement terms) againt last generation of soviet piston engine aircrafts and early generation of soviet jets aircrafts)