The MVP Machine [0] has a lot of interviews and background with Driveline folks, including their now-disgraced-turns-out-hes-a-terrible-person headline player (Trevor Bauer).

What's unclear is how long-lasting the performance improvements are (can the pitcher maintain spin rates without constantly going back to the data and coaching staff?).

One very positive thing I've seen is applying the analytics to young athletes as a future injury prevention tool. We now can, with high probability, identify kids who are on the path to permanently ruining their arm long before they cause lasting damage and give them an intervention - "You can dominate in Little League, but you'll never be a pro if you keep doing it this way. You must either change the way you throw or stop trying to be a baseball pitcher"

[0] https://www.basicbooks.com/titles/ben-lindbergh/the-mvp-mach...