It starts with the offensive line as they are the guys who allow everyone else the time (QB/WRs) and space (Breece) to do their jobs. With Downing back, increased experience, a real offseason to condition (excited to see full offseason gains with Andrews), and tremendous depth I expect this unit to take it up a notch from their late season, peak performance. An area where they at times struggled was pass protection, something not accurately reflected by the numbers. Purdy was running for his life in several games last year, with Louisiana (understandable there) and Texas really standing out. The latter showcased Purdy putting on a clinic as far as being able to evade pressure and often make something positive out of it. Simply put, there were a lot of games where Purdy didn't have a clean pocket.
With improved pass protection (less communication breakdowns also being a factor in this) and a vastly improved receiving corps on paper, I expect Purdy to have a much easier time throwing the ball this year. In addition I'm expecting the staff will utilize more play action passing, capitalizing on the attention Breece is bound to receive. If Purdy somehow improves some of his own weakness, for instance long ball accuracy and or arm strength, watch out.
Offense and special teams have the ability to make massive improvements, things the average college football fan seems to overlook. On that note our STs were almost the sole reason we lost to Louisiana. If we can just be average there (instead of terrible) it will put points on the board offensively as well as take some off on the other end.