I would be happy already when the next batch of 054A have no Orekhs anymore, which would indicate active-radar guided SAM.
The semi-active HHQ-16 is a shame and it severely limits the potential air-defense capability of this frigate. With active radar SAM, the 054A could, for the first time, engage sea-skimmers and low flying planes over the horizon, as well as engage more targets than just four per side (as limited by the guidance-channels provided by the Orekhs).
I think active guided SAMs for the next generation frigate should be a given.
But we shouldn't look too poorly on the 054As air defence armament, after all when they were first developed the dominant naval AAW guidance mode still tended towards SARH rather than ARH. even now, most of the USNs aegis ships still use SARH guided SAMs and are only recently adopting active guided SM6s.
For a mass produced and relatively affordable, 4000 ton frigate I think the 054As aaw suite is still very competent and will still be relevant for the next two decades.
The navy probably could not afford 054A to use top of the line and new systems like 052C did, but technology has advanced to a state where they can afford to use newer systems on 054b.
ARH SAMs, quad packed SAMs, and increased future proofedness using the common VLS, and superior battle management systems are probably all going to be part of the 054b AAW package.
It may not even be worth upgrading existing 054As with ARH SAMs in a decade or so, because by then there will probably be such a large number of aegis type destroyers and 054bs for the air defence role that 054As will be used more for ASW and general patrol roles where higher end AAW capabilities are not necessary.