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@RAGRam @flv
S shape makes a ton more intuitive sense than something linear. Can't have more than 16, can't have less than zero. The shape has to flatten out somewhere on both ends as we approach those limits. If we could get the formula for that S shape, look where the Rams are on the curve. Just eye-balling it, one could reason that the steepest incline is pretty close to X=0 (league average). The scatters are kinda blobby, not a concise pattern, so this is all a bit of a stretch, but let's go with it anyway.
League total 2015 for points for (and points against) was 365, 22.8 ppg.
Rams had 280 points scored, 75 below league average, 17.5 ppg, 5.3 ppg below league average
Rams allowed 330 points, 35 points below league average, 20.8 ppg, 2.2 below league average.
Presuming that the S pattern is correct, that would suggest that the Rams would do better striving for league average on O (where they benefit from that steep X=0 tangent) rather than continuing to trying to improve the D where the laws of diminishing returns would take effect.