I have been re-watching some of the games from last year (the ones I still have on my DVR) and there are some things that stand out. I finished the Pitt game most recently,
1. Tim Settle is going to be a monster if he can avoid getting winded early in a series. He impacted a ton of plays last year when he was on the field. He did not always make the play but he stood up double teams, pushed OL into the backfield, and changed the direction of the runner a good bit.
2. I believe a more polished route runner can replace Bucky's production. Bucky made a lot of plays but they were usually on go routes where he was asked to use his body to beat the defender. It did not seem that he got open by running a crisp route very often. Our deep balls this year will come off double moves by better route runners (See Ford from last year)
3. Pat Narduzzi is an asshat.
I will keep watching and posting more things I have noticed. If you have been re-watching, share things you have noticed.
Disclaimer: I am not an expert and do not have the knowledge depth of others but these are what I have seen. They may be inaccurate. If you see something different, feel free to correct.