FA for me (arm chair GM) is to bring in 1 maybe 2 high prize PROVEN guys. Normally these type of players don't hit the open market your...Suh, Dez Bryant, Julius Thomas, etc...
The bread and butter of a team is the draft and player development. The best teams can draft and develop, helping keep the salary cap in check and prevents them from just throwing money at mid-tier guys because they have open roster slots (Wheeler, Ellerbe, Hartline).
You draft a 3rd/4th/5th rounder and expect him to become a decent contributor to the franchise in a few years, some may even become full time starters and real NFL caliber players (Jenkins, Clay, Jones).
You draft a 1st/2nd rounder and expect him to pretty much become a automatic and impact player for the franchise. (Landry, Pouncey)
Dream team builds usually fail, and are only built for short term success (Eagles).
The Packers have mastered the art of building teams in the draft. On the other hand the Pats have mastered the art of taking publix bag boys and turning them into Pro-Bowl players, this of course aided by a HOF QB/HC combo. ********* (note the asteriscs). Sp?