I can only imagine the idea of a JW mentor going down like a lead balloon.This suggestion demonstrates how idealistic and out of touch the GB are. They are promoting a "Biblical" idea but when used in practice I reckon it will find a 95% resistance by the offspring of JWs. JW parents are just about tolerable but getting people from outside the family to goad the kids into action will surely not work?
The real answer as you say PE is for JW youth to check on Google about the JW cult! Ah! satisfaction.