As has been said repeatedly, the main reason the FBI is involved isn't the NCAA or the sport. They are involved mainly due to wire fraud and bribery, white collar crimes involving not insignificant amounts of money and crossing state lines.
The FBI has an entire division with hundreds of agents that investigate white collar crimes. The only reason this particular case is actually relevant is that it just so happens to involve NCAA basketball. This has never been an NCAA matter, it's been an FBI/DOJ matter that just happens to have an impact on an NCAA sport.
The FBI gives zero ****s what the NCAA or various schools do with the information they've found, and the FBI gives no ****s if there are reforms in basketball. If they did they would have turned all the information over to the NCAA way, way back in 2017, not waiting until several coaches and other individuals had their trials and sentencing a few months ago.