Well, we came back around at the barbarian from another angle, and we’re pretty happy with how it turned out!
After a few different approaches (mighty emotions, damage-spurred power) we arrived at the barbarian as someone with a hunger—for power, for blood, for those things humans crave. That burning desire (and the boldness to follow it) is what makes them powerful.
That power comes in the form of rolling d6+d8 instead of 2d6 when making a move to pursue their appetites. While this isn’t something we’ve done before in DW, I’m pretty happy with it—it works out to be like a +1 bonus, but with much more variability. A 2 is still an option, but so is an unmodified 14!
Take a look and see what you think.