If you'd read the NEA proposal you posted, you'd see that alternatives to the current diploma system comprise point #4 of the proposal:
Expand students' graduation options through creative partnerships with community colleges in career and technical fields and with alternative schools so that students have another way to earn a high school diploma.
Do you agree or disagree?
I find myself agreeing with both you and Wintertime.
One of my proposals for an alternative path is the Free Republic high school diploma. http://www.freerepublic.com/focus/f-news/1316882/posts
If we freepers pursued a path like this, the NEA would drop their recommendation for such alternatives. The NEA does not have the best interest of students at heart, but rather its core constituency is teachers.
I'm going to post Wintertime's solid example on another thread...
"There are homeschoolers by the thousands who do not have high school diploma. My own homeschoolers with their B.S. degrees in math at age 18 are merely one small example."