I'm not very far in the DE so can't really do much testing, and I don't fully see how different it is from Classic Edition yet.
What I don't get is how come you're making 3 attacks when basic attacking with two weapons?
The Two-Handed ability also increases the critical damage you do with two-handed weapons. So when it's about *critical* damage, two-handed should do the most damage in one attack, as it should. That's the point of using a two-handed weapon. You're using only one weapon, so you forgo the defenses from a shield, and you also miss one entire set of bonuses that would come with a second weapon in the offhand.
Also keep in mind that when dual wielding your offhand weapon suffers -50% damage.
DW has only the dodge-ability.
The Dodging bonus from Dual Wielding is very useful on certain builds, AFAIK. Another advantage of dual wielding is to trigger on-hit effects. Both weapons can have on-hit effects that can be applied in one attack. Or when you're using Sparking Swings or Venom Coating, you trigger the effect twice when attacking with two weapons.
