After hearing Peyton say "we are what we are" when referring to the Efense, I can't help but wonder if he's right. After all, our problems are often not guys getting loose, but missed tackles leading to guys getting loose. Sure, guys are going to get loose once in a while, but I think the impact of that happening is being exagerrated a bit by the fact that so many guys go for big runs due to the tacklers' inability to bring them down after getting a hand on them. It makes our Efense twice as bad as it would be otherwise.
Maybe nothing is changing on the defensive end because nothing CAN change. You can't teach strength, and these guys just aren't strong enough to bring the big boys down.