The Illinois job is much more desirable now than it was in 2012. Newly renovated facilities. Well respected AD. Great recruiting class coming in plus solid pieces among your returning players. Another advantage is you have no seniors next year. If a coach can get next year's group to excel, it gives him a huge advantage because he returns that entire team the following year and gives him the opportunity to create some big time momentum to propel the program back into the upper echelons of the game.
I don't think people are making an argument that groce needs to stay. The argument is what's the best option. Take a mediocre coach because he is better than groce, or find a strong coach who can build Illinois basketball future. You have to think the direction is wait for the right person. If we have a debacle transition, that class is gone and we don't know that players like black may leave as well.
For the health of the program, I believe the recruiting class needs to stay together and enroll, or we need someone similar to Lovie take over. At this point, based in who is available, it's not clear to me that we have the second. If not, I'd rather take a year, bring in the class and begin the search next year to pull a stud coach