Susan the Scrum Master

You chose to explain your experience and offered the coachee the mentoring path.

Susan agrees. You offer the team a 4 hour use story splitting workshop, a reference to a user-story splitting mini-book, or for you to take a look at some of the stories and give further advice. The team decides to read the book and give story splitting another go. The next day, Susan says "we're close, but the book just wasn't enough."

What do you say to Susan?