The 2000 yard season might be less absurd than it appears. Garrett does not like to call plays that reduce the options to running the ball or have interest in creating plays to run the ball. With a terrible O-line in 2012 somehow he was calling 40 pass plays per game average. If Callahan or Jerry or Bubbles the monkey does any math here they will see that 1/3 of Austin's 900 yards and Bryant's 1352 yards came after the catch. They will also see that 80 to 90 percent of Felix Jones and Murray's receiving yards came after the catch. Other than the departing Felix, the obvious strength of these receivers is YAC not Joiner/Jefferson/Chandler downfield Mach speed.
So if the "system" stays as Garrett says it will, there is good reason to think that Bryant will be the equivalent of a WR and a RB in terms of targets and touches. Without the changes and input that IMO Jerry is orchestrating in the offense w/Callahan and maybe Dooley, Dez Bryant had 455 yards of his 1352 total yards after the catch.
Now that Jerry is insisting that Jason's offense add something, anything, there could be much more