Do we really need this discussion? Are most yuri doujin with a bit of "force" (i would not even call it that) going to be called rapey?
Sure, why not? What's wrong with talking about this? I think if there are multiple people who have some kind of negative reaction to the way Rin and Hanayo are acting in this doujinshi it's well worth thinking about.
I'll repeat: Discussing problematic elements is not a judgment call on the media itself nor the people who consume it. It's about awareness and, although less so with this particular work as we can hardly influence the Japanese scene, hopefully about improving the general quality of media as a whole.
It is not a problem if this discussion happens once. But if people start the discussion in this already very harmless douin, where does it stop? If enough people complain in the comments to many doujin are we going to have a "rapey" tag?
I am just afraid this is going to turn into tumblr 2.0