More important question is whether Pickett would have made the D better overall, that is, number of points allowed. Those figures for the team defense during Pickett's stay aren't much better than the run defense.
2011-2013 the points allowed ranks are 19th, 11th and 24th.
Its more than Pickett or Raji or the defense would have been better prior.
Bud Adams told me the franchise he admired the most was the Kansas City Chiefs. Then he asked for more hookers and blow.