This year's defense, APRH, will be a test of a couple of ways of planning your D.

Do what you do well and have everyone on the same page to limit mistakes. Helps with rookies, young-ins and injuries. Might open you up to being abused by a sophisticated offense (Saints, Patriots, Broncos) if you don't win the individual battle. While its not the Johnson/Wannestadt/Bates defense in scheme, it is the philosophy.

Scheme to stop the biggest threat to your team's success. Know where your weaknesses are and be prepared to cover them or hide them. Its complicated, better run by vets but will not give good offenses easy choices. If the other team has a weakness, scheme to attack it, you won't have to hold the backend forever if you are successful.