After punching a few numbers based on submissions in round #3, I'm absolutely certain purist needs to go back up to 4 points. It's almost negligible to the overall community scoring. As of this writing, the relatively scoring importance of each badge is:
Ding! Max (224)
So it looks like Purist really needs to be a 4-pointer. Faithless is still a low-performer even at 4 points, so it's definitely not going back down to 3. Again, please note that Ding! Max, Cheeky, and Specialist only score lowly because they're worth so few points. If you analyze strictly based on frequency they're by far the most dominant badges. Hoarder, unstoppable, parched, and miser look to be about right. Warmonger, as I've already mentioned, isn't very useful data; all Berserkers went for it, no Wizards/Transmuters did. None-the-less, we will try moving it down to 5 points for the next competition and see where it goes from there.
TL;DR - purist should be 4 points, warmonger 5 points, keep everything else where it is.