Failed? Really?
They DRAFTED a Top-10 QB, which is again, the hardest position in all of football to draft. They also drafted two REALLY good WRs. Our RB picks have been pretty good, and Diggs' played pretty good as a Rookie too.
But I'm sure you are talking more about the defensive side sine we've had pretty big misses as of late. Well, unfortunately our old DC wanted a few guys that didn't pan out. I have no issues allowing the HC and coordinators having input, but in this case we missed badly with two of Marinelli's "pet cats" (Taco and Hill).
But your argument sound a lot like if Aikman, Emmitt or Irvin didn't pan out, we should never draft 1st Round QBs, RBs or WRs again.
That's just silly. Oh, we missed on some players (just like every other team in the league) so let's try to build through free agency (a method with a MUCH lower success rate).
I'm glad you are not a GM, just like I'm sure your glad I'm not.