I'd like to say that Ichika is already out in the sense of story potential... but of course, according to the latest chapter, she's still in.
Oddly, Eyaslunatic's statement below has made me think that, yes, things are feeling generic, especially with Nino and Ichika. What the author is doing with them is certainly out of the ordinary... but it's the same romcom status quo of the tsundere and the teasing onee-san...