I agree that Argentina could be improved. Maybe make it five stripes instead of three? Just add a bar of white at the top and also the bottom. The red symbol in the middle is great, but maybe we need more than one, let's make it four in a horizontal row. Since there are more now they've got a be a little smaller and therefore also simpler, something recognizable but cool like a brewer's star.

Oops, just made the Chicago flag again. Unbeatable.