This defense is much closer to its peak than the offense is and the offense has a much higher peak than the defense. Right now, it looks like this Iowa defense is going to have to take more chances than it has in the past in order to get pressure on the quarterback. It may have to commit those same resources to slow down an opponents running game.
I kinda take a little issue to this statement. Iowa's O has been playing against lower level opposition than they'll be facing Big 10 play. You gotta figure that that will pad their stats a bit.
Furthermore, the D has already been adjusting from a pretty major personnel change-up. Thus, the guys who are now starting together still are capable of coming together more, communicating better, and playing better TEAM ball.
Even if the D simply just improves its tackling, improves at preventing the long-ball, and does a better job of setting the edge ... all pretty basic and FUNDAMENTAL things ... then the defensive production will be MUCH better! Those basics alone could probably account for 80 to 100 yards, on average, PER GAME! And, in reducing the oppositions yardage, that will obviously also improve our scoring D too.
Lastly, we have A LOT of guys who don't have a whole lot of prior experience seeing A LOT of game action. As the season continues to unfold ... those guys are going to be able to adjust more to the speed of the game ... and consequently "play faster." As they get more used to things ... that will help the DL to control their gaps better and keep guys off the LBs. The less experienced guys in coverage ... and theres A LOT of them ... are going to have an opportunity to start reading and reacting to the flow of the game more ... and that might end up equating to them making better breaks on the ball OR better breaks on the receivers ... thereby leading to more picks or pass break-ups.
I agree with the assertion that the O has a higher ceiling ... however, at this juncture, I actually believe that the D may be capable of improving even more ... at least in terms of production.