Falling leaf has a place, not in a lesson, but its not always a bad thing. I started doing falling leaf toeside and heelside.
By lunch on day 1 I was linking turns on green runs without hardly falling. Day 2 I was negotiating blues and some ungroomed blue pistes with 2 feet of powder
Certainly doing falling leaf for too long is counter productive, but I think it helped me to grasp the feel and balance of being on either edge before linking turns.