If the Electoral College were done away with, it would be the beginning of the end of States being anything more than historical vestiges. As it is the Feds are trying to micromanage States to a common Federal standard so as to wipe out State to State differences. States would eventually be like Counties are in much of the Northeast. Counties technically exist but County Govt was done away with long ago except for Sheriff’s Depts being based on County jurisdictions, and even then in States like Massachusetts, the County Sheriff’s Dept only function is to run the County Jail and provide some services at the County Courthouse (which itself is a State run entity being there isn’t any County govt.). The Electoral College is one of the key items that makes States pertinent.