Leave the Illinois state outline on the field and on the court. We are the only school in the state that can justify using it. Illinois State perhaps, it as the elder institution, we get dibs. The directional schools, any of the other state schools, the private schools including Evanston’s Big Ten school, don’t have the geographical mandate.
Plus the profile is unmistakable and distinctive. What else are so immediately recognizable? Texas, of course. Idaho, Michigan, West Virginia, Virginia, Maryland, Florida, maybe Indiana. But of all of those, Illinois best fits its state monogram. It’s compact, with no extraneous bits like WV or MI. And it looks like a dagger. Keep the state outline.