Sadly, as long as our education system is incredibly test-focused in the push for "teacher accountability", no "soft" curriculum like this will ever be a reality—despite how much better it would be for learning.
Well, part of what I was suggesting is that it would only be a part of the overall curriculum. So a student might elect my 'project academy' as two of their courses for a half year.
In a high school program that has 4 * 2 * 7 scheduling, 2 semester hours isn't such a big chunk of time.