1. I haven't seen WFS. I agree that most popular documentaries are manipulative and should be taken with a large grain of salt.
2a. US schools aren't as bad as you think, it's the students that are bad. I believe outcomes for Chinese students here are much more similar to Chinese students in Singapore than they are to Chinese students in China.
2b. There is probably no magic bullet in school reform, and even things that are most worth doing will probably show small effects.
3. Disappointingly, research shows that charters overall haven't appeared to perform very well.
4. Nevertheless, there is a subset of charters that does appear to perform better. It would be nice to allow those charter models to expand. But there are many political obstacles to opening new charters.
5. Personally, I would like to see less power for unions of all kinds, and public sector unions especially. I think teachers are great, and I admit that unions help them get higher compensation and less mistreatment by employers, things which I fully support. But this is outweighed by the negative effects of unions: they block all chances for positive reform other than tinkering around the edges, they often protect the jobs of even very incompetent teachers, and they lobby for compensation structures (e.g. DB pensions, extra pay for master's degrees) that are bad for the system.