Hmm, PLA really can’t employ its air doctrine the same way without a dedicated EW aircraft like J15DT. And for the foreseeable future, this is the only option available to them.
PLA is many different things though. PLAAF, which is clearly tilting towards offensive stance, is one. There, J-16D prominence (as key multiplier) is indeed reality. Though it isn't absolute, and it's this way exactly because PLAAF fleet is established. Take small PLAAF detachment away from mainland, and you'd see that J-16D is again not the aircraft type you begin from...
PLANAF, which right now has just two operational carriers for a whole huge fleet, is another.
Basic requirements for naval aviation, in order of priority, are:
1, persistent undeniable reconnaissance
2, maritime strike,
3, force protection
4, land strike
(2-3 is generalized, and for weaker navair arm 3>2; PLANAF is a weaker naval air arm).
Furthermore, there's a growing question of carrier ASW, which is also part of that 3-2.
EW aircraft supports offensive missions the most, less so defensive ones, and supports reconnaissance the least.
Priority for PLAN, currently, is it's two fighter types, closely followed by (individually more important) deck AEW and heavy ASW helicopters.
EW are after that, together with more dedicated future refueling capability.
More so, because PLAN won't be able to truly establish diverse airwings for a few years to come.
003 will be first unlimited PLAN carrier.001s are constrained by space and aircraft consumables, 076, even if considered, is probably unable to operate J-15 to a reasonable extent. 003 is ultimately a single ship for years to come. It is in only one place at best; it also can be in maintenance, it can be sunk.