Given the demise of constellation class, my thought on 054B has changed quite a bit. In short, it's waste of my time.
My longer thought on this:
constellation class had mission creep because USN realized after it picked basing on FREMM class that the original hull really isn't sufficient to protect itself in open water against China's hypersonic threat.
Given that is the case, I really wonder why 054B in its current form is something you want to mass produce? Especially, if you want to have it as a legit ASW escort to carrier fleet. The main issue imo is that it's propulsion is not appropriate for something expected to be competitive in 20 years. Instead of using some form of IEPS that uses the most powerful diesel engines (something 9MW+) + battery pack, it still uses CODAD, which is simply not efficient for energy usage. This would prevent it from higher power applications that is likely to have very high leap in capability in the future. Anything from putting high power laser, higher power sensors to more powerful motors that.
054 made a lot of sense to me as an interim class to test out new hull and propulsion so that 054A can fully explore the new platform. 054B has a larger hull & more powerful engine, but it's still a very old propulsion concept that's not suited for future combat.
And they are ordering more of this? For all the decisions that PLAN has made, this is the most puzzling.
I think the mistake you are making is in viewing everything through the prism of carrier strike group operations.
Yes, CSGs are tip of the spear, best of the best door kickers, but your whole war machine can’t just be about the speartip.
The CSG, 055s and 052Ds are the sword, the 054A/B and 056s are the shields.
As the CSG engages enemy core fleet elements and eliminate them and shatters the island chains to push further out into the open pacific for offensive combat operations, that leaves ever increasing amounts of deep rear real estate to patrol and guard. And it’s not like the PLAN is going to make a beeline for Pearl or San Diego as soon as it’s punched through the second island chain. Most likely, they will seek to establish a cordon in the mid pacific and defence that against enemy forces seeking to breach. That’s what the 054As and Bs are for.
These ships are not meant to face off against enemy fleets or air wings directly. They are there to catch leakers that slip past the CSGs; provide survivable (against the threats they are realistically expected to face) patrol and sensor coverage to ensure there are no or at least minimal sensor dead zones around and behind the CSGs; and provide early warning and first response against any enemies forces that seeks to slip past or flank friendly CSGs.
For that kind of mission, endurance is the primary requirement, speed is secondary.
Sure, having just as many 055s would be far superior, but even China has budgetary and resource limits and cannot build 055s like they are 054Bs.
In that respects, the 054B holds true to the PLA’s core tradition that good enough is good enough. That’s how they have the budget left over for all the no-expense-spared top tier goodies without drowning China in debt like America has done trying to get gold plated everything.