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And that is a big part of the reason that all of my attempts to create my own uberstat metric have included something I called the "supermargin"...which is an attempt to define the non-linearity of dominance. Barry Bonds, in his prime years produced 12 wins or so on his own...but he also made the opponents play like they were a -4 or more win club when he was batting...which has a non-linear impact on the rest of the club.
If we agree that the margin exists and that players who fall below it are creating negative wins..then why isn't there a supermargin that stands for the moment when value you create also creates negative value for the opposing team?