Honestly I would have thought they'd try to experiment with equipping two different weapons at the same time i.e one in main hand, the other in off hand for more customization, with the upcoming rogue/ninja class. It'd seem perfect for different "Poisons" being applied to each blade thus having more of a way to really focus dots. (Instead of just spamming every single dot onto a target you can weigh up what would be best in that situation, something I'd think would be useful for specific long boss fights.)