-post snipped out due to length of my reply, however I am fully responding to the content of your post-
This is a larger question about what future naval strategy may be like for the PLA, so I'm going to move these posts to a different thread.
I strongly agree that I think UCAVs should form a significant part of a carrier's future airwing for the strike role -- but also to provide persistent organic and preferably wide scale ISR for CSGs or combined task forces.
However there are a few points you make which I will quibble with:
1. "effective counters" to HGVs -- IMO there is technically a "counter" to every kind of munition. Whether it's a direct attack munition, or a cruise missile/powered stand off weapon, or a ballistic missile or an HGV. Similarly, these munitions can be surface launched, sub launched or air launched as well. That is to say, I would expect HGVs to become multi platform in nature -- to have the ability to be air launched, surface launched, sub launched etc in the same way that cruise missiles are/have been. It is very plausible that future PLAN task forces may be built around a healthy mix of HGVs and cruise missiles, distributed among a number of naval platforms including naval air (UCAVs and strike capable fighters), surface launched (surface combatant/VLS), and sub launched (submarines).
2. The "problems" which plagued the F-35 -- imo the teething issues that F-35 faced during its development were not inherently related to the fact that they desired it to be a fighter with strike capabilities. I think the fact that it was such an ambitious programme to develop three different variants of the aircraft simultaneously, involving so many nations, and with a different developmental concept than some other past aircraft, made it appear to have more "issues" but in the end I think it has ended up being a very burgeoning success story. In the case of the PLAN, whatever 5th gen carrier fighter they end up with (likely an FC-31 derivative) IMO should definitely seek to have competitive strike capabilities -- perhaps it won't have the ability to carry the same large diameter weapons as F-35 can on its central two internal weapon bays stations, but it should still have the ability to carry some small powered strike weapons in the vein of JSM or KH-59MK2.
Which takes me to the overall future of PLA + PLAN warfighting concepts in the region.
IMO the key to future warfighting in westpac requires a combination of ISR which is persistent, multidomain, redundant and distributed -- with the combination of strike systems which is multi-domain/joint, responsive, collaborative and defensible.
To achieve the above, IMO it will require the leverage of both land based systems for ISR and strike operating in conjunction with seagoing and naval ISR and strike systems.
Land based strike systems include: long range bombers (particularly stealthy ones), with air superiority fighters capable of strike, large land based UCAVs, as well as mobile land based TEL long range missiles (HGVs, AShBMs, long range cruise missiles) with large regional reach.
Land based ISR systems include: large land based recon UAVs, OTH radars, MPAs, as well as a variety of satellite systems (which are technically space based but require a substantial land based infrastructure to effectively sustain so they are "land based"). However, the aforementioned bombers and air superiority fighters and UCAVs should all have potent ISR capabilities of their own and be datalinked to share their data at the operational level.
Naval strike systems include: aircraft carriers with carrier based UCAVs and fighters fielding munitions (air launched HGVs and/or cruise missiles), as well as surface combatants and submarines (fielding HGVs and/or cruise missiles, as well as torpedoes for submarines of course).
Naval ISR systems will primarily be made up of: aircraft carriers with organic recon UAVs, as well as the above carrier based UCAVs and fighters with their own potent sensor suites datalinked into an overall operational picture, and the various above ships and submarines will form bubbles of their own mobile active and passive sensor screens.
The purpose of a land based and naval component in the ISR and strike domains will of course be to try and cover up each of their respective weaknesses.
- A land based ISR and strike system is much less mobile than a naval one, and the reach and persistence of a land based ISR and strike system reduces the further from the coast you get. Beyond 2000-3000km you want an organic and capable self contained naval ISR and strike system, particularly in the ISR domain even if your land based strike systems may theoretically have very long range.
- A naval ISR and strike system OTOH is mobile, and able to go into the deep ocean, however if they are operating against a capable enemy with their own very capable naval force and supporting land based bombers and strike of their own, you will likely need to greatly supplement your own strike and ISR with your own land based systems if possible.
(Both your land ISR+strike system and naval ISR+strike system obviously need their own ability to defend against opposing missiles and aircraft; SAMs, fighter CAP, CIWS, and potentially DEW in future etc)
So, my concept of operations will be that you want to combine a land based ISR system with your naval ISR system to have more persistent and reliable ISR coverage at greater distances from the coast between 0km to 4000+ km. Meanwhile, any opposing forces that are detected by your vast array of land based and naval based ISR systems can be effectively engaged not only by your naval strike systems, but also your long ranged land strike systems.
Such a "strike package" optimally should be multi-domain -- i.e.: involving a number of different munition types (HGVs, AShBMs, AShMs, and potentially even torpedoes), launched from a variety of different land based platforms (TELs, long range bombers, long range UCAVs, land based strike fighters)
and naval platforms (carrier based UCAV and strike fighters, surface combatants, submarines).
The purpose of a multi-domain, coordinated strike package will of course be to attempt and saturate the defenses of an opponent by forcing them to simultaneously against a number of targets across a number of domains.
Of course, EW/ECM is an important domain as well, and you require effective EW/ECM/ECCM to enable your ISR systems to work -- but offensive EW/ECM against the enemy as part of your strike package in the form of escort jamming aircraft or escort jamming UAVs or even escort jamming
missiles may enhance the success of your overall strike.
.... Going back to the YJ-XX missile discussion for 055; it is my way of saying that I think having a potent surface combatant anti-ship/anti-surface capability will likely be an important category of anti-ship/strike systems for the PLA's overall menu of strike options.