That's not the point. It's just weighting it properly for the individual to make it correlate better to run scoring. You are essentially comparing BA+IsoD to BA+IsoP I guess, and we could be more precise with LWTS or whatever to tell us what that comparison is. Though I'm not sure what it'd be telling us. OBP and SLG even have different denominators, it's an apples to oranges comparison. The reason that GPA (1.7*OBP+SLG/4) is useful is that it scales well to BA and EqA. However it's not adjusted, and the gains from OPS are marginal. It's just a little easier and more accurate back of the envelope calculation that people are familiar with (the OPS part, at this point anyway) the components. If I wanted to be precise I'd use EqA or something similarly complex. OPS is just fine as a quick and dirty stat for most purposes. If spotters for PBP data had a stopwatch, fielding metrics would be a lot better. I forget who said it first, but that's all you would really need with where the ball was caught. Hangtime has to be a lot more accurate than "fliner." Anyway, whoever said that stats were too personal and lacked real-world run-scoring or whatever ... there are pretty much stats for everything now as far as production goes. A lot of stats are about removing context because a lot of that is luck and clutch. But there are things like WPA and LWTS by base-out state that give you a pretty good idea with the context in. If you are really, really concerned about context, then look at RBI and Runs Scored. It's a bad way to gauge performance, or make side-by-side comparisons, or make projections, but it's "what happened."