I don't like the English system and I don't want to change. Everything would have to change, right from the age kids start school because children sitting GCSEs aren't the same age as children sitting Nat 5s as there is a 6 month difference in intake. I don't like that my niece has to take "triple science" which is Biology, Chemistry and Physics and is equivalent to 2 GCSEs rather than being able to take each one individually.
And the biggest benefit of the Scottish system is the breadth post 16 - in most cases kids are doing 5 Highers, or 5 different things on their timetable. Having to choose 3 things after your GCSEs is far too narrow.
Some of the private schools offer an English curriculum but not many - I looked before when we had a ridiculous poster arguing that GCSEs were the same as Highers. AFAIK it's the REALLY posh private boarding schools, like Glenalmond, Merchiston Castle, Fettes and Gordonstoun which offer A-levels and GCSEs, often Highers too. The "ordinary" private schools like Watsons and Heriots in Edinburgh or The High School of Glasgow or Hutcheson's in Glasgow do Nat 5, Higher ans Advanced Higher.
We don't need to throw away our perfectly good education system which served so many of us so well. We need the SQA and the Scottish Government to stop meddling with the curriculum and stop the SQA fucking up exams.
I'd also be in favour of allowing other exam providers to compete with the SQA like in England/Wales where schools can choose which exam board to use for which exam. At the moment there is no competition and the SQA can do what the fuck it likes, be as incompetent as it likes and there are no consequences.