The only way I can envision that deal not being good enough is if the money there would be the reason why the Jets can't extend Revis or some other downstream effect.
For argument's sake, let's agree that Keller is a JAG. Then that would mean the Jets have had less than JAGs at the position since Mickey Shuler hung it up. If $11 mil is what it costs to put a competent player on the field, then that's the market. I definitely don't want to see a much-cheaper Cumberland producing much-cheaper results on the field.
Before we throw Keller to the wolves, people should realize that Matthew Mulligan was a starter last year. Grass ain't always greener. Plus, in the above deal, Keller is cuttable after two seasons with a $4 mil savings.