I loved the idea behind corruption in Black Goat but the implementation was very lacking. Our group's main complaints was that corruption hardly ever came into play and even when it did it never really worked as a system of bonuses at a cost; the cards ranged from "meh" to flat out bad.
Looking over the summaries of Threshold it looks like they're basically admitting they screwed up corruption and have fixed it (unfortunately for another $30). Does the whole pact and power token mechanic succeed where corruption failed?
We all know I disagree, but I will focus it into "broken" being a bad choice of words.