I read the paper today myself. It is the best English language article I have read on the subject. I think the authors painted the overall context and strategic implications very well.
I understood the cutaways as useful illustrations: the source is clearly stated.
For some of the weapon loadout claims (like HQ-16B), they quoted Chinese sources.
What particular conclusions did you find questionable?
Where to begin.
First of all, the inclusion of CGIs without clearly conveying for every single one of them that they are non-official and speculative, was quite concerning to me. It's one thing to include a CGI for illustrative purposes, but then to interpret CGIs as if they are somehow representative of actual Chinese naval thinking is a flaw that can't be easily ignored. One of their cited CGIs of an 055 cutaway is described as "a cutaway reveals attributes of the new vessel's design," as if they believe that the cutaway is somehow representative of the real thing, whereas it should've been described as "a non-official cutaway shows a speculative configuration of the ship".
Second of all, the inability to actually discriminate between Chinese sources is a bit concerning as well. Just because a source is Chinese doesn't mean it should be taken seriously or that it should be described as "Chinese strategists believe". The weapon loadout claim is a perfect example, because at this stage we don't have any evidence to suggest that HQ-16 or DK-10 or YJ-83 or even CJ-10 are part of the loadouts of 055 (or 052D).
Third, the quoting of various English language sources of dubious quality -- your TNI and SCMP types
Fourth, some older inaccuracies like suggesting 055 may be able to fit Z-18s when it's been established for over the last year that it cannot, or the old name of QC-280, whereas it has since been understood to be called GT25000 instead.
Some of the comparisons are also a bit dodgy but those are my own personal valuations on how systems are weighed (e.g.: the description of Sejong class having more VLS than 055 is of course true, but when not considering the different in diameter of the 055's UVLS vs the Sejong's Mk-41 and KVLS it falls a bit flat)
.... Now this isn't to say it's necessarily a bad paper, and I think for people who are new to PLA watching or who know nothing about 055 at all then it provides useful context a general description of the class (albeit with some mistakes like I mentioned above).
But for a lot of us who have been following the 055 since before the land mock up began construction and who have been tracking basically every picture of it and every hull launched and every associated development with it, there are a few glaring mistakes and dubious interpretations of information that I think many of us wouldn't make as of what we know in early 2020.