I get that his Ds have ranked higher, but you also have to look at the number of games they face crappy teams and how many teams we faced solid teams. SO even if you look how they played against weak teams compared to ours you won't get the fact that our D may have not brought their best as a way to take a breather while for them it was just another week playing a mediocre/weak team.
I'm not saying Shoop is a bad DC, I honestly don't know, he may be the best DC to ever coach. I'm just saying looking at stats and rankings based on stats won't ever tell the true story. Much how a great O can be held back statistically by a D that can't ever get off the field and allows the other team to milk away most of the clock each game. Or even how that same great O can have its stats cut by a D that always gives it a short field and ST that always gets huge returns so they don't have many yards to work with to build an amazing looking stat sheet.