There are 32 teams vying for the SB each season. Some are building primarily through the draft, some through primarily FA, and some with a combination. Over the last decade or so, all the SB winners were teams that build through the draft. Giants, Packers, Steelers, Saints (at the time), Colts account for 7 of the SB and were Draft-Built teams. Only the Seahawks and the Ravens relied on FA. If you look at the core of those teams, however, they were draft picks that carried the team. Is this a new trend? I doubt it.
Since TT's tenure, every season, this is the same reaction of fans. I heard a Packer fan on NFL radio again complaining that the rest of the Division is passing us up based on FA signings and yet TT does nothing. Yet over TTs tenure we have one of the best inter-division records in all of the NFL; we have more division titles than Bears/Lions/Vikes; and have a better overall win/loss record. This includes the last 3 division titles.