As I understand it, the founding fathers did not consider a direct democracy a good form of government for several reasons. It failed in Greece and leads to an oligarchy.
Also they were concerned that an uninformed public could not be trusted maintain the liberties that were gained by so much blood and treasure. Public opinion is too easily molded by academics, experts, and media. Delegates selected by the states to represent their interests should be more informed and politicly aware because it is in that state’s or parties best interest to do so. I believe the electoral college still has a place in todays politics as long the government is not interested in having an informed public.