Hmmm.
I'd say it's the fact that the entire cast has about three faces between them, and the short-haired characters, apart from details like Marisa's braid and Yorihime's ponytail, have approximately three hairstyles between them. I mean ... yeah, I know, Only Six Faces (warning, TVTropes, etc), but this turns it up to eleven. She also insists on not drawing Marisa wearing her hat for no explicable reason.
To put it another way, the character designs seem ... bland. (Compare with Clash House (artists of Strange and Bright Nature Deity), or even VISIONNERZ.) Sort of like she's playing dressup with "paper dolls" instead of making destinct characters.
Huh, really? That's interesting, because that's always been my complaint about Clash House -- everyone has the same face and one of two hairstyles in front. (Straight-cut bangs and uneven bangs.) In a closeup and with clothes/accessories out of the picture, I don't think I could ever tell a difference between Marisa, Alice, and Sunny Milk in SaBND.
That said, Aki Eda's art definitely has its ups and downs. I think she draws really cute characters, but she's pretty bad at blocking and proportion and such. Besides the above, I've seen a lot of complaints about her work in action scenes and scenes with a lot of people.
As for chapter 16... half of it's been edited since February. Arsen
is coming back, right? Thank goodness for text translations, at least.