Not really true on the cornerback point and to a lesser extent the pass rush idea. Troy and Ed Reed never really had above average CB play outside of Chris McAlister who had his best years before Reed got there. And it’s a chicken or the egg debate. No doubt that both teams had great pass rushers but how much did the playmaking ability of those two safeties contribute to the flexibility of the defense to blitz? But I do agree that defense needs to be tiered to be good to great. You need an above average player at all three levels. I think where those players play is irrelevant if the coach uses them correctly.