Here is the hidden bonus for fixed wing UAV based AEW systems, they can be scaled down so it could be launched without a CATOBAR.Of course, CV-16 and CV-17 won't be operating KJ-600 from their decks anyway, so this question is sort of moot.
Basically instead of launching one large asset to cover a corner you send out multiple drones with much less weight.
This way you will be able to cover the area even if one vehicle is removed. This is the main reason why both US and NATO is considering to retire the E3 in the future and replace them with drones with the advent of Over the Horizon long range AA missiles.
As for extensive data networking, the US only started and will take another decade to place it into all assets, PLAAF and PLAN will take much longer with too many conventional assets which will require more retrofits placing a sat link, new onboard computers and advanced software.