They did, they got it down to 8. Doyle put Iowa up by 23 right at the start of the 4Q, and then Iowa did not score a point for over 7 minutes. The outcome was never in doubt, but things got really sloppy for awhile.
The problem is the team tends to thrive on adversity, but they cannot handle prosperity. When they are down, they scramble like Hell on defense, they throw bodies into people when a shot goes up, and they take care of the ball on offense. When things are going good, they get sloppy on all of those dimensions (giving up o-boards and coughing up dumb TOs have always been their bugaboos).
Doyle and Meyer can usually be counted on no matter what, but when Bluder tries to rest them, things just fall apart in a real troubling way. I guess it should be no surprise that freshmen and sophomores make dumb mistakes, but the drop-off is so severe when Doyle or Meyer sit that I can understand the angst.
I think what it really comes down to is fans see the ceiling of this team (currently #7 rpi, have been as high as #4), but they have not yet seen the team play at that ceiling for 40 minutes in a long time. They had 3 games in a row where they had deficits in the teens in the second half (all because of sloppy first half play), and they came back and won. Against MSU on Megan-Gustafson night, they get up 8 in the first 5 minutes, lose the lead with sloppy play in 2Q and 3Q (they played harder, but still had issues with o-boards and TOs), and then outscore MSU 28-9 in the 4Q. Iowa outscored opponents 94-51 in the fourth quarter over those 4 games.
Against PSU they blew their doors off for 3Q, and then they stunk the joint up in the 4th (mostly when they tried to lean on the youngsters).
They have been playing with fire lately, I think many just want to see them put it together for a whole game. Doyle has certainly been doing that, but the others need to come along.