My main takeaway from those seasons is all about lost opportunities. 2002, not so much, we were sort of "rebuilding" back after a poor '01. But 2003, we know the deal. 2004, again, same team screwed us up. 2005, our rivals screwed us up. Those three seasons, I can only remember lost chances for more. We had a few good wins in there, but the only one that really sticks out a lot to me is @ Michigan, and honestly, even that was only a 7-5 Michigan team. The '03 Becky win was also quite nice, but again, that was a 7-6 squad.
It just felt like whenever we faced a legitimate opponent, specifically on the road, we were overmatched, mainly because our defense wasn't good enough to stop teams when it HAD to in most games against those opponents. Those Iowa and Wisconsin scores listed above kinda show what I mean. Let alone the OSU games as well. You just can't let your rivals beat you up that much on a regular basis when you go to their place, unless you're dishing out the same punishment when they come to your house, which we weren't.
I don't know if Kill will take advantage of those opportunities or not, but building on the defensive side of the ball is a good start. Look at a lot of those scores, we gave up 35+ regularly. Not gonna work, gotta have the defense to compete at a high level I think.