The only player to receive a positive grade was Dansby, and that was only for his pass coverage. He had a negative grade vs the run and pass rush. That's about as bad as it gets.
I have been following PFF since they started, and do not remember a D being that badly graded.
On O, they gave Long a good grade is pass protect, less of a positive for Pouncey and Jerry in protect, a plus for Cog on the run, and Hartline for pass. That's it.