A better gun constrained by Flower-class availability

Would the late-war 3-inch/50 have been a better main gun for Flower-class corvettes?

Yes for air defence, but the Royal Navy used readily available stored 4-inch guns to arm ships quickly and in quantity.

The late-war 3-inch/50 would be a strong dual-purpose fit for a corvette, especially against aircraft. It could therefore improve the Flower class's air defence. The historical choice followed supply reality rather than an ideal blank-sheet armament decision. Large numbers of 4-inch guns removed from First World War Flower-class sloops were already in storage when the urgently needed escorts had to be armed quickly.