My main point is 055 is already playing the same role as Kirov. Very long range anti-air missile of same weight class, check. Very long range anti-ship missile that can reach carriers, check. There are other advanced warships in PLAN that is more advanced than Kirov but those are apple to orange comparison. 055 superseded Kirov's role while being 2 weight class below and that is remarkable. Imagine fitting a Ticonderoga's firepower into a frigate, that is the level of difference we are talking about. Remarkable even 40 years later. Yes Ticonderoga is about same age as Kirov.
Obviously folks can take this discussion wherever they like, but I would just like to clarify my own perspective.
First, I was using "Sino-Kirov" as shorthand for a very large surface combatant that is roughly double the size of 055, rather than suggesting a similar configuration/role. I said I was "holding out for" such a ship (rather than "anticipating", "predicting" or "recommending" it) to indicate that this was a rather whimsical notion, i.e
because it would be awesome, however I appreciate that I could've been considerably clearer on this point.
Nonetheless, I do think even fanciful ideas like a Sino-Kirov need to have some plausible basis in reality, for at first glance the notion is highly dubious for the reasons noted by several posters here. So the question becomes, if such a ship were to exist, what characteristics and role would it have? What could such a vessel do better than could be achieved by a pair of 055s? I think there are several possible areas such a vessel could focus on that would benefit from the "above linear" scaling offered by increased volume/displacement:
1. Shore bombardment, whether using railguns or more conventional artillery. More power, more mounts, more barrels, and much, much deeper magazines. Such a vessel would look to achieve sustained bombardment capacity
at least 4x that of 055 to justify the exercise, and this should be easily achievable. Additionally, such a vessel could potentially host very large missiles beyond those that can be accommodated by the general purpose VLS on 055/052x. See the LRHW missile being fitted to Zumwalt, which weighs about 7000kg.
2. A super-sized radar to serve as the AAW/BMD fulcrum node for the entire battlegroup, as detailed in previous post. VLS capacity would probably be considerable, but not really the point of the exercise.
3. Helicopter ASW with much better sustained operations characteristics than can be achieved even with dual hangar types like 055 (and hopefully 054B). Basically the
Hyuga role. Definitely useful, but this is probably a different ship from one that addresses (1) and/or (2).
4. Symbolic value. Nice to have, but if you cannot justify the ship otherwise....
TL;DR: Would a very large surface combatant just be a super-sized 055? No. Do I think PLAN should begin work on it in the next five-year plan? No. Do I think the notion is entirely inconceiable? No. Would it be awesome? Definitely.