The Desert Wind I kind of refluffed a little in my head. Think of Barbs from desert or arid mountain, and plateau country. They're harnessing their environment and heat, and their own inner power and rage into concentrated bursts of damage.

Iron Heart I agree had the worst fit, but I figured it'd give you a change to make some barbarians like those from Diablo 2. Not all Barbs have to be mindless. And some will be intelligent enough to really work on their weapons mastery. The original reason I tossed it in was for things like Iron Heart Surge, with just fits so well.

And yeah, Tiger Claw is great. The only reason I didn't focus on it more was because I know a lots of barbarians don't dual wield, And they need some 1 or 2 handed options.