Lol. I can't tell you're not a creator yourself, because you're vastly underestimating how time consuming it is to work on these. So yeah, you "forgot" about the most time-consuming part of the whole process: thinking. The creator has to think of all the scenes, and all the characters in the scenes, and how they affect each other and the overall plot, and the different branches in the narrative and how to rein them in to the main story. It's a hell of a difficult job. I'm not bothered by you underselling Eva's job--if anything, I'm bothered by you disrespecting the profession itself. But I'm not really bothered because this is a forum for erotic games and honestly who the fuck cares.
Personally, I'm amazed at the speed and consistency with which Eva delivers the updates; and it's not a matter of being a "true fan"--the only other game I really follow here is Kingdom of Deception, where an update much smaller than an ORS chapter takes anything from 3 months to half a year.