The story is a bit weird. I think if you wanted to show the madness of dungeons it could have been a protagonist experiencing it. He's kind of just making basic floors in random orders and he doesn't really comment on it or explain his plans or anything.
Good lord the Princess arc was terrible I'm glad that's over. I really wish the author made it like 100 years instead. You really expect me to believe these people have been around for 500 years when they just act like normal people?