So, I finally got some time to continue my research and I've watched a few titles with Hatano Yui, as planned
First of all, her performance in
JUFE-533 (a title in the series I've already added to the opening post as worthy of attention) is great, though she could've certainly used more throating. I understand that this series is about teasing, but still. Closer to the end she finally takes it all in a few times, but I wanted more. Even considering the teasing thing, she could've given him a really deep one in the very beginning to actually tease him even more. (I've watched only the third scene, the oral-focused one.) The cock is also a good one, quite long and not too thick, possibly close to the "ideal configuration", though the balls could've been bigger and saggier
Second example:
ARM-764. Again, one of the series I like, but her performance here is lackluster. Even considering the concept of the title (tongue play etc.),
Kawagoe Yui (whom I also should study more) gives a better performance, with some deeper oral
Third example:
MIAA-005. I thought this would be a great one for comparison as it's a double-oral title with Sasaki Aki, one of the greats. But the title overall is underwhelming, though gotta admit, it got me to appreciate anilingus a bit more (that angle at around 53:40 is so lewd it's bound to either repel you or boost the "porn energy" for you, I think, i.e. it's one of those "dividing things")
Same with
MXGS-1048: there is only one 1-on-1 oral scene, and there, the cock isn't big enough to do anything out-of-the-ordinary with it. Overall, her potential seems wasted in this one, though I mostly skipped around. Seemed boring
(I might update this post as the research progresses...)
Overall, she's quite beautiful (and more beautiful than cute, see my attempt at a rating system
here), has OK tits and ass, but yeah, at the moment, I think I agree with BDrake, who placed her in the "not-consistent-enough-for-the-top" tier