I don't get why the addition of Spikes all the sudden is going to bring the Bills from possibly the worst D in the league to one of the best. I just don't buy the whole line that a good linebacker can elevate a defense that much. The Bills had talent on that defense before they got Takeo Spikes...Pat Williams one of the best in the business, London Fletcher a very very good MLB, Keith Newman was supposed to be underrated, as was Coy Wire, and of course I keep seeing those corners flouted as one of the best tandems in the league.
If you've got playmakers like that in all three levels on D (especially at DT, LB, and CB) then if you're not putting that together into at least a mediocre defense then there's something seriously wrong and it isn't the players its the coaches. And if there's a problem with the defensive coaching, you can add whoever you want to that defense and it isn't going to bring it to the top. The problem with Indianapolis' D all these years wasn't talent, it was coaching.