Mike Boyle only has best intentions with his ideas. Coach Boyle uses "Isolation" exercises to help turn on muscles that have a hard time firing such as glute medials. It's pretty common to see peoples knees cave in towards their midline when squatting, that is a sign of weak glute medials and/or tight adductors. Mike would correct this using isolation exercises.
He's based in science as well as real world experience. All I'm saying is give him another chance.