Yeah, I think if they had a ghost of Christmas Future show them how their descendants effed up the gift given to them they'd have tweaked things a bit...super-majorities for big decisions codified, tighter limits on the scope and scale of government...and most importantly giving the 10th Amendment some enumerated unassailable backbone. Even if the latter meant the partitioning of the nation in 1860, it would have been preferable to the shat basket we've become.