So, in the Q&A Eva says that the game will probably only go to 15 or 16 chapters, instead of the 20 she predicted around chapters 9-10.
Then in the recent status update, Eva says the chapter 11 epilogue, which is supposed to cover one Friday just from Lena's perspective, is "almost as long as Lena's previous part in Chapter 11 (and still I couldn't add all the ideas I had...)"
Maybe it's just me, but taking these statements together would seem to indicate that Eva may be getting tired of ORS going on this long and taking the time it does... until she gets into writing and drawing it and then it balloons in terms of size and scope and she keeps having more ideas for it.
In the long run I wouldn't be surprised if we get only 3-4 more chapters... all of which are huge in size and get released in sections because they all have a lot of content. For example, we get a prologue, then Ian or Lena (whoever is first up that chapter), then the other one, then the first one again, the second again, then an epilogue. All in sections (12.1, 12.2, 12.3...), released irregularly over the course of, say, 9-12 months total. So the number of chapters is less than expected but the length of play time in total is just as long as if there had been several more chapters.
Don't get me wrong, I'm not complaining about this if it happens, it's just interesting to me to see that Eva herself seems to be pulled back and forth between moving ORS towards a conclusion and continuing to tack on more ideas and more choices, spinning out the game into longer paths. It already happened with chapter 11; Eva herself said she had planned for various events and crucial decisions to happen in 11 but ended up focusing on some of the available relationships just continuing along instead. And I do think she'll stick with the plan to have big plot points happen in 12, but after that... I would bet the story starts spreading out and slowing down a little again...