The flashback about Iris and the MC showed that their relationship was incredibly shallow. Most of it was just Iris fishing for complements to boost her ego after being dumped, and the MC just wanted to bang her because he thinks she's hot. They had no chemistry together, and I think the game would be better off without her in it. We really didn't need yet another love interest when we already have several routes that are underdeveloped. I also hate how intrusive, inappropriate, and handsy she is with Alexis.
If the MC goes with Zach to spy on the girls in the shower, the girls are rightfully disgusted with them. But when Iris kisses Alexis (who clearly doesn't want to be kissed) and then later spies on Alexis having sex with the MC (again very clearly against what Alexis wants) it's just laughed off as Iris being a quirky weirdo. Iris makes a move on the MC when Alexis isn't around by saying that she's totally down to have sex with him if he wants, which is another really shitty thing to do to Alexis. Of course, Iris plays it off as a joke when he doesn't bite, and then she asks him to set her up with Erynn. I hope we can just tell her to go kick rocks, because Erynn doesn't need yet another creepy loser who wants to fuck her.