Carr doesnt necessarily NEED more time.. but he needs more protection. He cant be worrying that if he takes 5 seconds instead of 4 he is going to get his clock cleaned.
also you notice that the teams playing us.. its not that their QBs all stand in the pocket for 30 seconds.. they only take about 4 seconds themselves.. but when a play goes wrong and no one gets open, they can afford to take a chance and wait for someone to. It would be nice if Carr had that luxury.
Most importantly isnt the pass protection though.. its the run blocking. Teams with dominant run blockers, usually have very good pass blockers too. One comes with the other. And we NEED run blocking very badly.