I'm gonna have to agree with FMT on the Falcons D.
I've only seen one Falcons game in its entirety, but I've seen parts of three others. Much like the Packers did to us in week 1, the Falcons got ALL their pressure against us via the blitz. I think they DO have a good D line however, and their number 6 ranking vs the run (even giving up 8 rushing TDs vs the Chiefs) is legit. However, their sacks come via the blitz, not a 3-4 man rush like the Panthers had last year.
The Falcons biggest change has been their change from 3-4 to 4-3 in the off-season. It's freed some linemen that were too small for their positions the past couple of years to go into their natural positions. Their D is merely adequate, and their failure against the pass both necessitates their blitzing and is exposed by their blitzing. They are 30th vs the pass btw.