Great news. Scalia was a Supreme Court Justice for like 30 years, he is by far one of the most influential jurists ever in the U.S. It is very fitting to honor such a man, I mean we do have Brandeis after all. And they waited until Scalia died so there really is nothing improper, other than "blah blah gays blah blah I'm liberal."
Indeed, for longevity on the Court and influence on historic decisions, he's nearly as historic a figure as Roger Taney (28 years as chief justice) and his rulings and place in history will be similarly reviewed.
It's great that the school is getting $20m in exchange for the renaming, however they are setting themselves up for an ugly debate in the future when students lobby to have his name removed as they protest now against monuments honoring former slaveholders or Confederate leaders.