My big questions:
How much was the defensive line helped last year by outstanding coverage? Can it return the favor this year for the relatively inexperienced secondary this year?
Can Purdy spread it around without that one huge bailout option streaking down field, and can the young backs keep the pressure off him by being productive both in rushing and blocking?
I think the answer to those questions will be positive, but if we see some struggles here and there, it would not surprise me to see them come from these uncertainties.
IIRC the dlines have been their most effective when they've stayed in their lanes etc. They started getting away from that last year toward the end including the bowl game and the result was extra yardage for the opponent.