In my reading I came across a comment by one of the reporters about Philbin being the King of the Slot WR.
With the addition of Graham and I expect a very effective run game, play action and delay / wheel routes out of the back field or crossing from the slot should be very productive options and with Graham even more so.
I am not worried about the Oline but I am quite sure we will see a very different offense.
2011 the Packers lead the NFL in Scoring, I see that happening again. The running game should much better, and the WR /TE options are as good as or better.