I'm not holding my breath, to be honest. I've had interviews with multiple MLB GMs and while the stat nerds love the pitch of developing velocity / reducing the chance of injury, there's a filter/block somewhere in player development. It's just how it is. I even did some math on what it's worth to a team to develop velocity in their castaways (cough cough, Scott Kazmir anyone?) and showed my work:
http://www.drivelinebaseball.com/2012/05/12/making-the-sabermetric-argument-for-increasing-fastball-velocity/
But it didn't resonate.
And guys like Trevor Bauer (not widely liked by professional coaches, I'll admit) sing my praises from the high heavens, and Ryan Buchter posted the best strikeout rate by any reliever in AAA last year after doing my weighted ball program, and we have multiple Perfect Game 10-rated players (for whatever that's worth; both guys should be high draft picks which matters more), and, and, and...
Baseball is a ridiculously slow-moving sport. That's just something that I've learned to accept and get over. All I can do is advance the science and development of my programs and not focus on the nebulous end goal that has no defined criteria to achieve. It frustrates my wife to no end why I haven't gotten an offer despite MLB GMs flying to see my place and meeting with higher-ups all over the place and MLB coaches recommending me for jobs.
It doesn't frustrate me THAT much. We are in the dark ages in player development; we are so far behind. We are worse off today than baseball ops departments were in the 1970s when Bill James and Pete Palmer were just beginning to give birth to linear weights and win shares. And when you think of it that way and see how long it took for teams to embrace sabermetrics... well, it's hard to get too angry.