Yeah. I agree.

The idea is to allow the student to have fun expressing themselves. If you only obligate yourself to 30 minutes, you will find yourself going beyond that. Yes, this is more of a jazz approach, but once you connect with your instrument it is easier to learn written pieces and interpret them. Bach was a great improviser and that's why he was able to pump out the paper ; )

Practice regimen is tricky. I think it requires a balance of theory, technique and application. It all depends on where the student is and where they want to be.

I enjoyed reading the article by the way. Just offering a method that works for some : )