The situation with Frank shows that "Send that skater to Coach X!" is not always the best move, no matter how wonderful, fantastic, and how much success Coach X might have. Frank was the "Send them to Raf!" of his day. USFS wanted Graice and Frank together.
But Skater A and Coach X need to be right for each other, and Gracie and Frank weren't. After living through Christopher Bowman and his (severe) drug addiction, it was "never again" for emotional investment for Frank.
Gracie needed more and Frank was not equipped to give more. Good matches need more than technical skill.