Mike Talamantes, head coach at Park University in Missouri and a coach at MAVS Volleyball club in Kansas, no longer believes all of his players should have the same "cookie cutter" form. He's learned it's better to tweak the athlete's current form than completely overhaul it. This method is effective because it doesn't mess with the player's confidence and can take less time than reconstructing their form.
Ultimately, the execution of the skill is more important than the form, as long as the player is doing so in a safe manner. An unconventional method may have the same outcome as a perfectly executed skill and Mike Talamantes is perfectly fine with that.