Gus Bradley, when the chips were down, relied on his secondary to man up and his LBs to cover. He didn't blitz much.
Dan Quinn, when the chips were down, relied on his D-line to create pressure, adding a twist or a stunt here and there. He didn't blitz much.
Kris Richard, when the chips are down, relies on blitzing LBs to create pressure on the QB and force a mistake.
It's a different approach from the successful Seahawk defenses of the past. It might also become the most effective approach in the modern NFL; Carroll's defensive philosophies combined with Richard's penchant for adding a LB to a pass-rush every so often...you look at the defensive DVOA numbers and tell me what is stopping this team from putting up another historic performance. The possibility that they might be more effective than the 2013 squad is real.