If Dallas can gets its defense going, generate a few turnovers and hold opponents to fewer than 30 points, it should take a huge weight off Romo. He wouldn't walk into every game with the knowledge that he has to score 4 touchdowns just to HOPE to have a CHANCE going into the 4th. This would give him a chance to return to his 2009/2011 form.
It really all comes down to the offensive line. Can they get any kind of a running game going? In the passing game, Romo makes the line look better (imagine what that would mean if Drew Bledsoe had his anvil-feet planted back there) with his Houdini acts. If he could actually plant, scan and deliver without fear more often, it could come together for Dallas.