You could cane children in 1970s! Would people really want to go back to that? 
It does seem that he can't get back grammar schools and so he will give every pupil a grammar school education, despite the fact that 75% are not suited to it. The average IQ is 100 and grammar school and university was never for the average.
We need an education system that differentiates and suits the needs of all, including all those with SN. His idea appears to be that if you have a square peg in a round hole you just keep hammering until they fit!
Teachers are against all the many changes, implemented by people who haven't a clue, who then don't give it time but find it doesn't work ( which they are told in the first place, but don't listen) and then change again. If you are going to have changes, they need time to establish and work.
I am pleased that mine have gone through the system, two of them would certainly not suit it. There needs to be room for the practical and artistic and not just the academic. You can't force them to be academic. It all sounds rather like the French teacher who kept my dyslexic son in to learn the spellings because he got most of them wrong. I don't generally interfere but I did point out that he can't spell in English and he could be kept in until Christmas but he still wouldn't be able to get them right!
I also wouldn't want them in school for any more hours than they are already and I don't see how teachers could physically cope with more when they have so much planning, preparation, record keeping and marking to do.
I don't think Gove has a clue! Having come up with his 'wonderful' idea of picking up litter or writing lines, what does he propose to do with the child who says 'I am not doing it' ( in rather stronger language!)