I mean, that's an opinion rather than any sort of fact. A bold claim, even. I'd counter to say the "one" being referenced is singular in nature. I don't have any problems telling the characters apart, and their expressions and hair are all intentionally distinct. Granted, this chapter is depicting characters seen occasionally throughout the past 100 chapters, but there's not much to be done about that.
Anyway, just wanted to say I'm totally here for all of Shino's buddha faces.