I also feel the Mig-31, F-14 philosophy and the whole 3rd gen missile lobber idea is making a comeback. I am willing to bet the B-21 will have A2A abilities. Aircraft design have been able to combine several separate types already. There's already little obstacle for bombers to conduct A2A roles. In the past it was limited by missiles, seekers, guidance, and networking. None of these obstacles exist to the same degree today. Nor do they need aggressive performance if they are lobbing missiles from long ranges. Altitude and speed also help which is basically what these bombers are designed for as opposed to the terrain hugging controllability of certain attack aircrafts. Certainly in the interim, J-16 is the ideal and only fighter for this role in PLAAF.I've thought about the possibility of H-20 having a secondary A2A role as well. The PLA may be intending to use H-20 as more than a mere stealth bomber -- one of the PLA affiliated media outlets directed stated in an article a year or two back that EW/ECM, data node, UAV control, ISR may be part of its role as well.
The weapons bay of H-20 would likely be enough to accommodate a respectable number of PL-Xs, and would be a very powerful A2A platform when acting in support of more conventional fighter forces.
But that obviously depends on how many H-20s end up getting bought as well as just how multirole H-20 may be.
In the interim, the carriage of PL-Xs aboard J-16 and maybe other flanker variants still represents a viable capability, and a new one that they did not have before.