... and then Richards himself asked a very valid question in response:
It's absolutely the right thing to ask. Most of the first year of Statcast™ has been about identifying what we can measure, and how much of it is useful, and why. Spin rate in particular stands out, because while measuring things like foot speed or arm strength is simply putting numbers to things we've always seen, spin rate is something most of us had never even considered before 2015, much less put numbers to.
So, to Richards' question: Is high spin on a curveball good?