The problem is that this is all reactionary by the NCAA to try to hold itself together. It is a Band-Aid at best. Further, they should be honest with their motivations. By suggesting that this minimum amount is for all student athletes they put a "noble" gloss over What this really is, namely, the bigger schools pushing the smaller schools out of the market.
The good news is that smaller schools having the ability to "opt out" will take some of the pressure off them to maintain viable athletics. For many small private schools, athletics may go back to what it originally was, an extracurricular activity that has student support at games.