Dual wielding can be done, but it would be very tough to properly implement in game. The entire benefit to dual wielding is that you can strike in different locations (aka, make multiple threats) at the same time, while still maintaining some defense. It falls into a place in combat which is somewhat between the more aggressive melee styles and the more defensive.
Simply put, there is no way to input the commands like that at this time. It would be cheesy, and lackluster in my opinion, because you would never be able to do what a good dual wield combatant should be doing. You lose all the defining style, and it just becomes a double swing, or a double block. Unless you put in a second set of commands for the off-hand weapon which would then require a lot of keybinding and pain to perform.
I just don't see this as something worthwhile, given the technical issues with it. It would be fine in a full body control VR environment, but you lose everything that makes it work in a keybind style game, in my opinion.