Gamers have been indoctrinated that it looks dumb when someone has an empty hand. It just feels like one is "wasting a slot."
They're probably going to keep it as a double attack with one dagger or one attack with each dagger. They'll have to balance it so the stat boost doesn't make dual wielding the obvious choice, probably by increasing your miss chance or giving you a slight damage penalty.
Dual wielding doesn't necessarily have to be about daggers either. Someone could want to dual wield two axes. That's going to be even harder to balance, however. Probably each strike would do 40-45% the damage of normal, so you'd deal 80-90% of normal damage, but you have a higher chance to apply statuses and you get more stats. Larian might just stick with daggers, though, since those already have a double attack anyway.
