From the start, Ferals could wear a weapon in their main hand, which were typically a dagger or a 1-handed mace, and an item (for stats) in the off-hand. Ferals mostly chose to use 2-handed weapons, because the daggers and maces were typically made for healing. Why? Because all itemization was made for Restoration.
This changed when the stat Feral Attack Power (FAP) was invented. Now, we were given 1/2-handed maces with FAP (the latter part of Vanilla). Why? Because Blizzard hadn't figured out how to convert the damage stats from the weapons to our very fast auto-attack speed (baseline 1 attack per second). And remember, back then, we didn't have main hand and off-hand attacks, so we lacked the very basic game mechanics to actually dual wield.
Later, we were given relics in the item slot where others had an off-hand weapon or item. They have also been removed.
Oh, someone said we'll just use staffs and polearms as we always have. That's wrong. We couldn't use polearms during Vanilla and TBC.
My guess is that we will use 2-handed weapons. Which is really nice in my opinion, not only because I think those daggers look bad (I mog them into other dagger skins now - the irony!), but also because I think our Druid armour sets look way better with 2 handed weapons. So now, we just have to convince the devs that we need to "wear" our Legion cat skins without also having the Legion daggers visible. My guess is they'll cave in with patch 8.2.