Sabermetrics just gives a more detailed and more accurate description of what happened as far as productivity. Hell, if you know how to look at OPS and each component of it (OBP and SLG) and account for park factors, that's more than enough. As far as pitching... WHIP, HR/9, BB, K ratios, IP, and runs allowed are not complicated stats that when combined, give enough non sabr-stats to paint that picture. Of course these stats tell you what has happened and not why it happened, which I'm more concerned with.