Why War Emergency destroyers accepted design compromises

Why are the Royal Navy's War Emergency destroyers sometimes criticized?

They were wartime intermediate designs rather than the most powerful fleet destroyers, but they were useful and suited to urgent production.

War Emergency destroyers were capable ships built under production pressure. They did not match the most powerful fleet destroyers, but the Navy needed an intermediate design that could be completed in numbers. Their simpler layout reflected the wartime balance between combat capability and construction demands. Whelp's machinery, torpedoes, radar, and depth charges show how much work the type could still perform.