OK, maybe predictable isn't the right word. But the plays that once steamrolled opponents with a dominant offensive line were ineffective when the offensive line wasn't dominant. During their Super Bowl days, if defenses cheated, committing eight players to stop Emmitt Smith, Aikman and the passing game prospered. Maybe it was time for a change, time to do something new. Which is the primary reason Jones hired Gailey.
Talent obviously is the pivotal variable.
If Aikman is constantly running from defensive linemen it doesn't matter what scheme you use. But Gailey's complex playbook has its advantages. If nothing else, it forces defensive coordinators to prepare for just about everything. People will say, 'I know what's going to happen here. You'll always have armchair quarterbacks who think they know all about the game of foot ball.