IMO the one thing that i think what makes ORS progress kinda slow is that Eva doesnt really trust hiring other people to work on some part of the game, like she doesnt really trust people to fully work on drawing and choose to done it herself, based on the complexity of the game, its really hard just to write the story of the game, but Eva combined it with Coding and drawing by herself, so yeah if she focused on too many things, its always require more time than just focusing on other thing...
At the same time i kinda get it, on why Eva doesnt really trust other people to work on some part of the game, on Art aspect, her game has that kind of uniqueness in its Art, so she scared that other artist cant deliver that uniquenes the same as she delivers it, the story aspect is the same, maybe if its not Eva, we wont ever get porn game in this kind of complexity, and if she give this story part to other people in mid developing, she doesnt sure if the new writer can keep up with the foundation of the story that she already build in all this years, and Eva too dont know if the new writer can makes the story as perfect as Eva had in her Imagination
