Butler was a victim of his refusal to trade picks to move around to get the players needed at the right value.
His philosophy was to stay put and let the draft play out.
In this year, he badly miscalculated the availability of the safeties. He should have moved down from their 1st rouod pick and picked one in early 2nd round, because by the time their 2nd round pick rolled around - he panicked and reached for Tilman.