Are you serious?
1. How would the controls for that even work out? There are already 2 analog sticks, making dual wielding nearly impossible.
2. With overpowered items, such as the stun gun, dual wielding would create an imbalance, guns would stop being used, and Era's economy would be ruined due to the fact that most melees are tradable, I could quote Talon or Johnaudi on the problems of making all items droppable/tradable.
3. If it were to get implemented it would most likely cause the trading economy to flip-flop, making all guns tradable and all melees un-tradable.