A more offensive fleet will have a higher need for tankers. The Chinese Navy has just obtained their first CATOBAR aircraft carrier, and the demand for equipping it with an advanced trainer aircraft is even higher. So we can expect a similar tanker, but we won't see it flying on the Fujian anytime soon.J15s would not be able to ariel refuel as well as a tanker variant of KJ600. And there is currently no MQ28 equivalent.
Though I do think an ASW variant would be of great use. I also think ariel refueling is super important otherwise why would US Navy create a MQ28?