Call me too optimistic but I think his statement with at least 3 season is actually a positive comment. As a writer, deciding how your story will end from the beginning is key to success. However, although major plot points are the things that stay in our minds because of their psychological effect, what makes a story fantastic is not where you arrive but how you arrive there. The small details, the pathway between the major plot points or even the goofy moments. One of the things I loved at the 5th episode was
. I think what DPC shows with this comment is his flexibility. Story-wise at least 3 season is needed in his mind. But now he clearly enjoys working on this project. You can see that from his enthusiasm on the music for the new episode. I would prefer a 3 season show where the creator enjoyed every minute he works on the project, rather than a 4 season story that is extended just for the sake of doing it (or milking your patrons, yeah ICSTOR, I am talking about you). But I don't think he will stop with 3 seasons. The story allows for more seasons, the budget allows for more seasons, we can easily expect 4 seasons. However, him setting the goal with 3 is good for now because setting too high a bar may discourage one on the way.