I'm considering this once I hit lv20. Is the damage even worth it?

I haven't really heard anything about it, but as a priest, I would rather have a tank with a shield, if only to help me out a little. Let the rogues and mages worry about damage.

Yeah a warrior needs to block. Duel wield you get half the damage of the weapon in your off hand, and like 25% miss rate. Only thing you can kinda use for your advantage is using the off hand weapon to further increaste your stats.