Graham played poor in pass coverage, and I believe that's the reason he was getting chewed up by Diaco on the sideline. Too many missed assignments in passing plays, which I think a lot of us new coming into the game. Stewart needed to work on his cover game. 11 tackles, 1 tackle for loss, and 1 forced fumble doesn't scream "extremely poor game" to me though. He had a great game with some things he needs to work on.
Now on your D-line comment I have to kindly disagree with you and agree with "huskymedic" there was no push all game, nor pressure. We made a running QB look like Peyton Manning. He had ALL day to throw and with that he had plenty of time to find an open receiver or tuck the ball and run. This can also be the reason why the DB's and LB's looked so bad in pass coverage too.