Their legacy will be that they were one of the most dominant teams and Brady is one of the best QBs ever. I'm not even a Pats fan, but that's what the legacy will be. I don't view spygate as seriously as something like steroid usage when it came to Bonds, for example. Or McGwire, for that matter. It may have given the Pats a leg up, but it's arguable how much of advantage it gave them. I'd say it was a very negligible leg up, if anything.
And the evidence totally supports that. When they were cheating they were winning Super Bowls left and right. Since they were caught they haven't won fuck-all. Clearly not an advantage in any way shape or form.
Some clowns still believe in Lance Armstrong too. (preemptive no one believes in Ryan Braun anymore).