So far, the only original story that J.K. Rowling wasn’t primarily responsible for (Cursed Child) sucked. I would rather her expand the Wizarding world herself. That may mean fewer stories, but it would also mean better stories. I’ll take quality over quantity any day.
No!!! The wizarding world is J.K. Rowling’s world! The Cursed Child was terrible because she did not write it and if her beloved world falls into the wrong hands than it could go terribly wrong!