I reckon it’s in response to predicted grades being wrong in the vast majority of cases and the loss of AS results as any sort of externally assessed benchmark of aptitude.
This. When the government consulted on dropping AS levels, universities said they were against the idea, because they liked having a reliable indicator of ability. Gove ignored this, of course, in favour of the voices in his head.
There’s no way that university applications could be made after the results without making exams much earlier. Exam boards have a tight enough window to mark as it is. Teaching time would have to be reduced to compensate for exams being earlier. Course content would have to be reduced to allow for reduced teaching time. Students would go to university having covered less material.
Bad idea all round, basically.