Don't want to get too far off the Wright topic, but nobody has proved that OPS isn't a useful statistic, or that it's highly deceptive. It's flawed, certainly, for the reasons you mentioned - that's why I said that the stats I was using weren't perfect. But if team X has an average OPS of .750, and team Y has an average OPS of .700, it's a good bet that team X will be more productive, by any offensive measure you're willing to use. I used OPS because that was the stat that was easy to copy off the web quickly. wOBA might have been better, but I don't know where to download up to date wOBA quickly, conveniently, and cheaply by player. Regarding exit velocity, the FiveThirtyEight article seems to imply that exit velocity isn't particularly useful unless coupled with launch angle, with the exception that home runs have a consistently high exit velocity. And simply looking at average exit velocity and average launch angle wouldn't be helpful, as you'd need to look at each instance in tandem. That is, an average exit velocity of 85 mph and an average launch angle of 12 degrees may represent a good line drive hitter (if there isn't much variance in that launch angle's distribution) or just a stiff who pops up and grounds out a lot (if the launch angle's distribution has a high variance).