A valid criticism, I think he's getting too ambitious, and he can break his face later on when he sees he won't be able to handle what he wants to do.
We're talking about a fucking porn game, history is welcome, but if I wanted something supreme, I'm going to read a book.
In my opinion, he wastes a lot of time on frivolous things, which don't add anything significant to the game. As you said, there are many routes, and it will become increasingly difficult to interconnect them. And at the current rate, it will take years to complete (I have my doubts about that), and it will end up getting obsolete and lost in time. There are fervent fans here, but I wonder if they will still be 5-6 years from now.