I mean they are middle school/soon to be high school kids so the idea that they're all starting to develop romantic feelings and attraction is fine. I figure if it happens it'll happen and I don't see it turning into some kind of romantic soap opera or anything because Kanade and her relationship with ballet is always going to take precedence over Kanade and her relationship with potential love interests and as this chapter showed it's something she's largely ignorant of/not interested in anyway.
More importantly once Kanade's off in London I hope we dont' see the rest of the cast largely dropped. Shouko, Sakura and Ema basically the other main characters so we'll definitely get spotlight chapters and Kanade checking in with them but I hope characters like Julia and Risa don't basically fall by the wayside because I like them a lot.