Sounds right. There were various trials of new schemes prior to the new GCSEs.
As I mentioned, the GCSEs replaced both the O levels and CSEs so the grading needing to allow for that. I?m sure there was a lot of ?debate? at the time, there always is, but I don?t recall it specifically.
Whether one exam is better is a matter of opinion. Employers at the time were faced with candidates holding CSEs and O levels. Grade 1 CSEs were designated to be equivalent to an O level. Some people may well have ?double counted? if they had a CSE 1 and an O level in the same subject. I certainly suspected it on some CVs I saw in my engineering days.
Equally, the new system has higher, intermediate, and foundation papers in, say, Mathematics so is a C always the same? In theory the candidates answered some of the same questions but some in practice, one doing the higher paper could have got his marks by answering only difficult questions and skipped the easier ones.
The bottom line is, no exam system is perfect. I?m not against exams etc, far from it. Then, I always got excellent results from my classes. ;-)