You are asking a lot of a starter product. Assuming a tabula rasa DM, the starter set needs to teach the basic rules of the game, table management, adventure design, treasure distribution, running monsters, and improvisation when the players go off script. That's a lot. The current starter set design eliminates all the prep work tasks and focuses purely on activity at the table. If you are going to add prep work, you are going to double the amount of material in the book and things the DM has to worry about. More importantly, you're going to either need a second box to teach those intermediate steps OR make the starter set a $50.00 product to fit all the additional materials.