Our O-line is incredibly overrated. Possibly the most overrated unit in the NFL period
Early on I thought this is as well but you have to factor in the impact that the limitations of Weeden is having on the unit. I've always said one of Romo's great strengths is his ability to get the team lined up and into a play that beats what the defense is showing him. He wins a majority of the chess matches at the line of scrimmage.
Weeden on the other hand is a novice at pre-snap reads and adjustments. He's simply not smart enough to play the position and he lacks physical talent.
The result of all of that is this.....with Romo in there, even without Dez, defenses have to respect our passing game. That means defenses have to play things honest/straight up. Which equates to more running room for the RBs since LBs and safeties aren't crowding the box like they do with Weeden.
That's the biggest reason that the OL looks like hot garbage right now. When Romo returns running lanes will "magically" return. You'll see.