I think there are two types of fans expressing views on this and they are worlds apart. There is the casual fan who loves basketball, liked Crean's up and down pace, doesn't really know the X's and O's. They look more at the record and I think would be more influenced by a few key wins here and there. I hear this all the time, they say,"But we won Two Big Ten championships".
Then there is the other group. I am going to say there is 2 sub groups within this category.
The first sub-group are people who played ball, I talk about this with my friends who played ball. It wasn't fun for us to watch IU under Crean because all we saw was all the mistakes, and the unsound things that his teams did. Not blocking out, not in a defensive stance, horrible defense, and crazy turnovers, the list is endless. All of my friends, every single one of them, just quit watching because if just mad them mad.
The other sub- group are people old enough to remember Knight and liked the way his teams played. Indiana fans were proud back then of the fact that IU played smart and played great defense. Heck, Btown McDonald's gave a free hamburger to anyone with a ticket stub if Indiana held the opponent to under 50 points.
Asking those fans to like watching poor defense and high turnovers , well that is a big pill to swallow. Poorly played basketball is hard to watch even when we are winning. A few more wins make no difference.