Don't need injury reports to see that Rex has taken a lot of hits and been hurried quite a bit. Yes the oline is better than last year, but that aint sayin' a whole lot considering how terrible they were most of the time last year.
Olines in general are really struggling this year due to the lack of offseason and less practice in pads this year, which is why Rivers, Brady, Orton, Romo, Big Ben, Cassel, Newton, and Sanchez all have as many or more pics than Rex. Then there's another 9 or 10 guys with 1 less pic than Rex. It's not like Rex is leading the league in pics. There's about 20 guys with 4 to 6 pics so far.
Inconsistent protection, questionable playcalling, and no deep threat with Armstrong out adds up to a recipe for disaster for a QB like Rex. He may not be able to throw it 80 yards, but his physical limitations are near as big of a problem as you continue to claim here. His real problem is consistency and his tendency to be sloppy with the ball under pressure. Give Rex some time and he can take you to the superbowl, as he already did with the Bears.