An alternative cruiser-destroyer for the late 1930s

What alternative would have improved on the Dido and Tribal classes before the Second World War?

Numerous 3,000-ton ships with 4.5-inch guns could combine destroyer firepower, anti-aircraft defense, and more useful cruiser-like flexibility.

With no treaty limits, a more numerous 3,000-ton vessel could combine some Tribal and Dido functions. The proposed design has three twin 4.5-inch mounts, two quintuple torpedo banks, and substantial 40 mm armament. Rapid annual production before the war would have created a large force by 1939. The concept favors a ship able to fight, escort, and grow without combining the worst space constraints of a cruiser and destroyer.