For most of the Cold War FAA operated the mighty and lovely Gannet in the AEW role. And KJ-600 should be named whatever the Chinese word for Gannet is.Could be argued the CdG was designed with the E-2 in mind so the arrestor gear could compensante for the shorter deck, though, since the planes were basically bought with the CdG in mind and the Clemenceaus could never launch/recover anything bigger than the Alize/Tracker.
Also there is the whole thing about not operating fixed wing AEW aircrafts, by the Cold War, RN was using Sea King based AEW so they never had a requirement to be able to launch E-2 sized planes

