Some failed or failing Rotation churches expected big attendance increases. When it didn't happen, they switched back or lost heart. The short-term best many churches should expect is to improve the experience of learning for the kids they do have. Success needs to be measured in many ways, not just one. The Rotation Model isn't for everybody.
Some churches have a low commitment history or personality.
Church research and experience indicates that the best way to revitalize is to bring in new people. In every family there are things you just have to come to grips with. Some churches, like people, probably won't change. There is one church that I am very familiar with. I am acquainted with one of the staff members and friends with several of the teachers and C.E. committee members.