I think it's slightly more likely for the simple reason that cell count is a rough indication of overall capability and a smaller 'spread' leaves less room in the middle for a ship class to have a meaningful existence. To illustrate what I mean let's hypothetically compress the 'spread' even more to 96 cells on the 055. The question becomes does a '052E' with 64-80 cells have a reason to exist in the context of an already existing 055 with only 96 cells? I would argue, possibly not. Asked a slightly different way, does a 7,500-8,500 ton max displacement ship have a reason to exist in the context of an already existing 10,000 ton max displacement ship? Again, I would say possibly not.
I wonder about the same subject so I consider these possibilities:
A) 4 classes (055, 052, 054, 056)
B) 3 classes (055/052 single replacement, 054, 056)
C) 3 classes (055, 052/054 single replacement, 056)
D) 3 classes (055, 052, 054/056 single replacement)
The single replacements would be towards the heavier side.
On one hand China faces potential opponents with a diverse range of capabilities, likely to significantly improve at the low end, as well as a diverse range of potential conflict intensity concentrated close to its periphery but likely to involve expeditionary opponents with cutting edge capabilities.
On the other hand while China has caught up at the high end of capabilities a lot it still needs to invest a lot more of its ultimately limited resources in high end areas in at least the air and sea domains relevant to its potential maritime conflicts where its capabilities are deficient, non-existent, or must keep pace i.e. large DDG/CG, LHD/LHA/CV, specialized naval aviation, rotary naval aviation, airlift, LR bombers, a variety of next gen technologies. Not to mention low end but large scale improvements needed for its amphibious/naval ground forces.
In order to balance and meet these needs I think C) above would make the most sense with the 056/replacement also skewing heavier/more capable. While if I understand correctly you are suggesting B) above as more likely if the 055 is of lesser specs than expected.