You are correct. I really hadn't paid attention to Atlanta's defense during the season. Now after looking at NFL stats they are actually pretty much on par with the Packers statistically. But after watching them the last 2 weeks I would take their talent over ours. They have much more speed and upside on that unit thans GB has on theirs.
The bolder part is so important. And there was a learning curve. You are completely correct by saying that at the end of the season, that defense was/is legit. I predict, that they will give the Pats a hard time too. It is either that they can learn faster than the Packs defensive players or our scheme is too complex. I mean the average packer defender needs like three years to understand the play book, no actually to simply grasp it. Whereas the rookies of the Falcons needed like half a season to fully grasp it and to perform at a high level imo. Whatever the reason is, TT should be be held responsible. (at least partially)