For the people surprised and disappointed by the game, I'm really not sure what you were expecting out of this team.
I saw a defense that was initially making good reads and tackles, but quickly wore down after it got tired and started making mistakes of fatigue. There were several plays where the Illini defenders did everything right, but were simply not strong enough or fast enough to make the play.
I saw an offensive line that was entirely overwhelmed by a stronger, faster defensive line to such an extent that nothing worked on offense until the other team called off the dogs late in the third quarter.
Both of those issues will get better as the young players get bigger, stronger and faster. The Illini were essentially a juco team trying to play with a top 25 team. The results were to be expected.
The penalties - maybe people didn't notice, USF was getting called for a ridiculous amount, too. Part of it was the lack of practice time and the uncertainty of the game being played and the disruption in the game routine due to the weather delay. Part of it was the officials just plain not having a very good night, perhaps due to the same factors.
Nebraska isn't anywhere near as good as USF and the Illini have two weeks to prepare. Better times ahead.