So you think he should accomplish something that I'm not sure has ever been done at Illinois? No pressure...
Not sure when you started following recruiting, but Illinois has enjoyed some fantastic recruiting classes in its history. Actually some of them were indeed the basis for our truly elite teams (e.g., 89, 01, 05). I am not going to go back to the Henson years, where we were bringing in McD AAs in multiple years.
But even our 2002 class was recognized as one of the best.
http://athlonsports.com/college-basketball/top-25-college-basketball-recruiting-classes-2000
Our 2003 class would also have been top 10 had Self stayed with Randle, McBride, Villanueva, and Carter.
But even our 2010 class, was pretty much one of the top ones.
http://www.scout.com/a.z?s=75&p=9&c=14&cfg=bb&yr=2010
Team rankings are rather subjective, as the overall ranking depends on either average (i.e. giving more weight to top recruits in small classes) or total rankings (i.e. giving more emphasis on total number or recruits) depending on what recruiting service publishes them. But the bottom line is that the 2017 class will have many players to replace (Abrams, Thorne, Hill, Nunn, Tate, Mav), quite a few of them among our top players. The 2017 recruiting class will have to include multiple highly ranked recruits who need to be ready to contribute immediately.
Is it unfair to Groce to have such high expectations? Well, he would not have such high recruiting expectations if he had accomplished better recruiting balance in previous years, not going 4 years without a top-100 HS PG or C. And he would not have such high expectations had he not missed the tourney 3 years in a row. But that is on him, and that is the current situation.
With his back on the wall, he needs to replace multiple of his best players with players who would need to contribute immediately. Groce will not have the luxury to recruit just some decent players who may contribute as upperclassmen. The 2017 class will have to contribute immediately, not in 2019-20 or 2020-21 as upperclassmen. Furthermore, Groce will be on the hot seat and will need the PR boost of a top recruiting class.