Re: OPS vs. OBP vs. BAS
Theories in practice - 2004 Red Sox were presented with the almost perfect contrast of the defense vs offense. I think it is informative to see the direction they went
2nd base - important defensive position.
Bellhorn - poor defense, high Ks, mediocre BA, high BBs good power
Reese - great defense, low BA, low BBs, no power
The Red Sox chose offense over defense and it is rather obvious they made the right choice.