When kids from Germany visit American schools, it's like a vacation. I know one who was in California a couple years ago, in the tenth grade. She had to have intense help getting back up to speed when she returned home. But she had great fingernails!
My own kiddo is only in the fourth grade and is already ahead of American kids by a looong shot. She could probably go straight to sixth or even seventh grade next year if we move back to the US.
Another girl I know of with mixed parents moved here from Florida when her parents divorced. She was the top student in her school there. And when she moved here - a big flop, so bad she she almost got left back. She even failed English. Her mother, an arrogant German twit, blames the teachers. But it's just the system.
I think kids in the US are just coddled too much.
Very few students here get A's. That's because an A really means something. "C" really does represent the average, and the idea of grading on a curve would be met with disbelief.
And, lol, open book tests??? No way.
So, basically, whether they cancel 12th grade or not is not the question. The question is, what'll they accomplish in the remaining 11 years?
Also - the "sink or swim" system here, which begins in the fifth grade, not the eighth, has been revamped and made much more flexible, specifically to accommodate the "late bloomers". I agree that there should be more weight given to learning real trades in the US, and apprenticeship programs should be fully integrated into the system.
A kid here who goes through three years of masonry school starting in tenth grade probably has as much education as the average American with a pointless Bachelor's degree.