Hasn't the RAF churned out top quality QFIs for years without reams of painful courses of largely pointless exams? Surely the CFS course is a good model for a future FI rating/licence - a concentrated flying course with interspersed and relevant groundschool. People graduate with 'restricted' abilities and then progress through upgrades by reattending CFS to do further short flying/groundschool. Most importantly as well, the course is taught to a detailed syllabus with quality supporting Flight Training Publications detailing standardised ac handling and teaching points.
I am working towards my FI rating (nearly finished all the CPL groundschool) and have brought various books/syllabuses to read up, but there is no coherent information on the actual teaching points of the exercises. The best is the On-Track info that is modelled on the CFS notes.