I agree with the first two points.
I disagree with the third. Hell, we weren't even REPRESENTED in Parliament, that was the main issue.
And, Great Britain would have had a very tough choice: IF they were to allow Colonial representation in Parliament, the American Colonies would end up as a more powerful faction than those on the British Isles. If not, then, the American Colonies would be under represented, at best.
That does not sound like a "better" Government. And, personally, I still like our Constitutional Republic more than Great Britain's Parliamentarian system.....