I've been wanting to write a rather long post with ideas for how to fill out the gameplay in the future, I figure this talk about the brothel, with repeatable content and missable content, gives me an excellent entrance point to develop the subject. To avoid cluttering the page, I will put the different sections behind spoilers.
1. Organizing the main game loop and dealing with "missable content"
2. Filling out the main game loop and giving meaning to the time-management content
While only tangentially connected to the topics discussed in this post, I'm also curious if there are plans for the decision Catherine can make about what she wants for the future after becoming magus, I figure that choice happens a bit too early in the game to be a proper ending flag, but if nothing else it would be cool if each choice introduced a different side-quest for chapter 3, although I have noticed all the goals she can choose then are not only accomplished but even surpassed in the following chapters.