Colleges are secretive, so we need to make do with what little data the court forced them to reveal. I know of no data more current than this. Do you have any evidence things have changed?
Unless public colleges are secretly flying in the face of a Supreme Court ruling, your assertion that "being black is worth +1.0 on GPA, whereas underrepresented state is +0.1 and underrepresented county in Michigan is +0.3," is unproven by the evidence you provided.
Had you said "was," and explained that you don't believe things have changed, that would have been far more intellectually honest.