The problem with having exams would be the massive advantage kids in some schools abs situations would have. Some kids got no teaching during the first lockdown - colleges near me have only had them in every other week since September. Some have no laptops at home etc ...
My understanding of the external exams (which they are suggesting are not compulsory - you can set your own) is that they would be part of the evidence. Not that there would be a rigid mark that would mean you had an 'A'.
In many ways the consultation is quite radical - accepting teacher assessment with no moderation of how many students get each mark. Allowing teachers to choose which topics their students are assessed on
In reality, however, the amount of work for teachers is staggering and the idea of being able to appeal to your school, your teacher is just horrible.
I think the government declaring that there would be no algorithm used has made it very difficult to find a workable model
The government, however, promised that the grades would be in line with last year's (so an increase from 2019) and I think they should be held to account to make sure that this year's students who have had such a rough time aren't disadvantaged
I also have concerns that some schools - private schools for example where parents pay for education - will be under pressure to give very high grades and will find ways to justify this (they're in a lot better position to cram students for topic tests)