Here is the depth chart for this current Braves team projected to win 74 games:
http://www.fangraphs.com/depthcharts.aspx?position=ALL&teamid=16
Right off the bat, we can immediately add 1 win to Julio since has proven without much doubt he outperforms his peripherals by 1 win. That gets the Braves to 75 wins.
For some inexplicable reason they heavily regressed Ender's defensive value. He is elite defesively, it is a fact, so add 1 win to Ender. Now the Braves are at 76 wins.
Swanson and Freeman are probably both a little low, so lets add an additional win between the two of them. Up to 77 wins.
Call up Albies 1-2 months into the season to replace Jace, add 2 wins. Braves are now a 79 win team.
Sign Castro to replace Recker, add a win. The Braves now project to 80 wins.
Sign Valbuena to replace Ruiz, add another win. Up to 81 wins.
Now just add Sale to replace Wisler, without taking away anything from the MLB roster, and add 4 wins. The Braves are now an 85 win team.
So the Braves gutted the farm and got to 85 wins, and still missed the playoffs. And that is assuming they didn't have to give up ANY talent that contributed to those 85 wins to get Sale (which isn't likely).
Why? Why not wait until next offseason and trade for 4 years of Archer or some other Ace that becomes available?