I always assumed CBT was forced on CASA as University's wanted to get into the flying training industry. The existing "system" was not compatible with the University system and hence the change to CBT.
It's been many years since I have been instructing in a flying school environment, but during the first few years of CBT, training delivery was not changed, just the mountain of paperwork.
There hasn't been the same motivation to provide competency based training programs for Instrument Ratings, Instructor Ratings, Large Aircraft Type Ratings as they are not part of University Courses.