1.) The "5 yd cushion" has been a staple of this team since Belichick got here. It's won 3 Super Bowls and gotten the team to 5 AFCCGs.
2.) The deep balls to the outside argument is, at least partly, a product of the problems in the middle. How often does Hobbs, for example, get help on those deep balls? Compare what you see there with what you see on other teams. When opponents go long to the outside against the Patriots, it's as if New England doesn't have safeties.
Meriweather is 24 years old and has 6 starts in his NFL career. Mayo is 22 years old and has 11 starts in the NFL. Guyton is 23 years old and has never started a game. That trio, along with the grizzled 25 year old veteran Sanders, is what is patrolling the middle of the defense on passing downs. It's going to take all season for them to figure out what they are doing and to begin to mesh. Hell, it's going to take them longer than that. The question is going to be whether or not they can at least develop enough to hold up their end.
When people start realizing this, and accepting the natural consequences, blood pressure test results will be lower and there will be less panic among the fanbase.