So, you are here to prove Yuki point, that she was interesting only because she was Catulus, and not for who she actually is.
While I do understand your point of view, I have to disagree. Since Yuki is a congenital catulus, being a catulus is who she really is. All of her friends have only known her as an catulus - and are mostly catulus themselves. So in my opinion by taking the medicine, Yuki no only changes into a person she never was in the first place, she also assumes that all (other) catulus in general are only interesting because they are catulus. Thus implying somewhat, that "normal" humans are better.
Denying a part of your own personality just to fit in with the others is bullshit. And to be fair: the story sets off because Yuki is a catulus. She is insecure, turns into a cat and Ayano has to deliver her clothes back to her thus hitting it off with each other. And I believe that's what Ayano was saying: If she wasn't a catulus - which Ayano has known before - they would be normal classmates and maybe have had a slower start.
