No I wouldn't wonder or worry about the the fact that "tight range encompassed such a wide variety of outcomes." This is exactly how grading systems work. BA is useful because it's easily intelligible, has a long tradition, and doesn't require an advanced degree in statistics to understand. Plus, we can bring to it other factors: we all know, for example, that Ted WIlliams hit more home runs than Pete Runnels, even though their BA was sometimes similar; no proponent of BA argues that Runnels was a better hitter, even when his average was higher. The problem I have with OPS was nicely described above; the problem I have w/ various "WARs" is that I have never been given an explanation IN PLAIN LANGUAGE that is convincing or even intelligible. Since I'm a fan, not a GM, (just as I am a user of rear-end differential gears rather than a designer of them--and btw, I have been given plain language descriptions of those!), I don't have much interest in the kinds of statistical analysis that cannot be explained to me.