This series is about to get an anime, so let's discuss AkiShiho couple a bit
1/ Shiho in my country doesn't seem to have any antis, on Facebook or websites reading yuri manga, there are only comments praising her for being cute, tsundere or feeling sorry for her, but no one scolds her at all. On foreign forums, I see that almost every chapter with Shiho has people saying this and that. Many people threaten to drop the story if it focuses on Shiho anymore (I don't know if it will really be dropped, but every chapter sees it). I don't know if my taste in my country is different than in foreign countries or what.
2/ Is Aki making a hasty decision when Yori (ex-crush) has just had a girlfriend for a few months and has already decided to date (to test her feeling) with Shiho. What I mean is that Aki had just fallen in love, then found out about her ex-friend's feelings, and just after becoming friends again, she decided to go on a date. So if Aki still can't fall in love after dating, Shiho will be twice as hurt. I don't know if the author plans to continue writing AkoShiho's arc, because right now I don't see Aki having any romantic feelings for Shiho. The time Shiho left, Aki only felt angry because she was betrayed, upset because she didn't know the real reason why Shiho left. After that, Aki learned about Shiho's feelings, plus Yori had a girlfriend (Aki still had to test to see if he had ended his love with Yori or not) before deciding to date (to test her feeling) with Shiho. I think if Yori didn't have a girlfriend, Aki would probably refuse when she found out that Shiho had feelings for her. Therefore, there should be one more arc for the AkiShiho couple to develop their relationship, stopping here would seem too awkward.