If there's one facet of government that most of Europe and places like Australia DO have right, it's priority voting and the elimination of winner-takes-all elections.
We weren't supposed to be a nation of political parties, but that goal lasted all of about, oh, I'd say never. The two party system has ****ed up the US pretty hardcore these past 10-15 years or so, and while I doubt we'd see much of a change in presidential elections, at least we'd get some congressmen or representatives that don't vote as sheep.
But yeah... too much money in elections. This shit's never going to happen.