The issue I've always had with Romo is he doesn't trust his first read a lot of time, and if you're not 100% open, sometimes, he won't pull the trigger. The reason is because he believes he can buy more time for things to open up, where as a none scrambling type QB will just go with the read and move along as Weeden did. They did not allow Romo to spin away or get outside of the pocket, you have to release that ball. Another thing is, if you don't have a powerful arm, sometimes you just hold the ball waiting for something else to come open.
The last play, I believe that if Romo's back was in tact, he would've chosen a different player to throw to instead of the player who had a corner in front. There was actually a player deeper on that route, same side as Dez but much deeper that seemed wide open but a hurting back can prevent you from even attempting that throw.
Running screens all night is tricky because they did not blitz a lot of the times but threatened to, but I would've run a minimum of 5 to 8 screens and 5 to 6 WR screens just to let them know that if you try this ****, we will be moving 75 yards down the field in one shot, either that or put 2 TE in the game, spread them out in an empty set, then audibled them back into max-protection and HUGE PLAYS down the field would've happen for Dallas. We figured this out, yet Linehan and Garrett had no clue.