Treaty limits make destroyer helicopters unlikely

Would World War II destroyers carry helicopters in this scenario?

Probably not; treaty displacement and torpedo requirements leave too little room, while sloops can absorb the aviation facilities more easily.

Treaty destroyers are already tightly designed around guns, torpedo attacks, machinery, and limited displacement. Adding helicopters would require removing something important from the ship. Destroyers are therefore unlikely to carry them in this scenario. British sloops offer a more promising small-ship platform because their treaty ceiling leaves room for expansion.