There's only so many elites to go around, You need an elite QB , an elite RB elite WRs. Now you need elite CBs ?? And more than 1. How about an elite pass rusher as well , heck let's get 2
And now you understand why Allen and Glenn's defense is going the way of the dinosaur. Look what we needed to get into the top 10 in Allen's defense, Glenn's never even sniffed it.
Elite CB in Lattimore, a good/great CB opposite him and a playmaking nickel. He wanted massive size/speed DE's (Davenport and Turner) that could do things the human body shouldn't be capable of and as a result were always injured. You miss any of those and the other team had a weakness they could take advantage all game long. We never did figure out how to cover a TE. And if the QB had any mobility (which is the direction the NFL is going) it was game over.