What they crank out today suffers from grade inflation. No longer is 'C' the average grade. Kids and parents who pay over 100k for their diploma all demand above average grades. It's not as bad as presenting a diploma from a Caribbean diploma mill, but they're not what they used to be.
American high schools are already doing a form of this, with certain classes earning more than a 4.0 score in GPA calculations. 5.0 is quite common now, with 6.0 and even 7.0 scores on individual classes being possible.
Many games already have an S-tier in class/stats/builds, whatever the criteria is. Would be funny if higher ed ripped that off. Life mimicking art and all that.