This quote from Orton is telling:
So what went wrong on Sunday?
"A couple misthrows," Orton said. "A couple missed assignments. Pretty much what happens every week."
yes, he had bad throws. but "missed assignments" is also key, which is why it's difficult to solely blame the OC when we don't know if all the correct routes, reads, assignments, or whatever were executed correctly. The "happens every week" comment is worrisome, a QB is going to miss throws, but you would hope "missed assignments" would be eliminated, though again impossible to know how many missed assignments or wrongs routes there were.