I think when the Packers are fully healthy, they have a DAMN good system, with a great QB and they worked extremely hard to match the plays up, to add maximum confusion for the defenses.
That being said, they have also caught some lucky breaks...
As with exception of the Vikings, all the teams were missing a healthy star WR (Julio wasn't healthy), and even with the Vikings, they had a rookie star 1st round pick playing this first NFL game.... who didn't hear up until week 3.
All the teams we've faced so far have been missing an important DL.
The Saints were missing any DBs, but the rest had DB problems, as Vikings were forced to play rookie DBs in their first NFL game ever, against Rodgers and that was taking candy from a baby for Adams, Lions were missing a starting CB and had a rookie in his first NFL game ever as well, though as the #3 overall pick, I think he looked better than the average rookie...
The biggest surprise to me to me, is that the Falcons and Packers were missing so many DBs by the second half and neither team did better than they did...
That being said, if the Packers struggle, I think it's more likely to be due to injuries and lack of depth... as the Packers need a couple of good WRs, with only one of their top 6 DBs the Falcons seemed to be able to take away the Packers WRs with Adams, Lazard, St. Brown, and Funchess, for one reason or another out...
This scheme puts a hell lot of pressure on the defense, and this scheme has taken a post prime Peyton Manning, Matt Ryan, Jared Goff and Jimmy Garoppolo and to the Superbowl... so it's not surprising that Rodgers can look great in it, if he has the right pieces.
Though I do think we lost an important piece in TE Deguara, no one has looked half as good of a move blocker as he did, of course, he looked damn amazing against the Vikings. And we lost an important piece in Lazard, physical, large, smart, great body control and hands, that DBs sleep on because he's not fast and they think they know his route, but when he catches them sleeping he audibles and big play happens...