I suspect that only a few ATSU's will actually apply for the exemption, with even some of the larger units still 'bandboxing' at night.
This 'problem' has been under consideration for some time. There was a school of thought some years back, that the radar course could be expanded by a few weeks to include enough to warrant the issue of a procedural rating too. Anyone who has both ratings will understand what a silly idea that was! The ATSIN seems to point to a compromise that will preserve the APC rating. There may be a small reduction in demand, but ASTAC and Shearwater already base their courses around 'modules' of 3 or 4 students.
I did the first RGAT Procedural course at Bailbrook. There were only 4 of us on that. Martin Thomas was a first class instructor...pity about his taste in ties!!!