With today’s update, we added an option for Classic fury warriors to exclude 2-handed weapons when optimizing. It is a checkbox right under the “Use Recklessness” option in the setup step on Best in Bags and Best in Slot.
We added this option because with some talent/gear setups, you can theoretically do more damage with a 2-handed weapon than dual-wielding as a fury warrior. The optimizer, being an optimizer, will thus always pick 2-handed weapons over dual-wield setups in those cases. But some people would prefer to always use a dual-wield setup regardless – so check the option to exclude 2H weapons and you’re good to go.