New fields should be added to weaponry such as weapon speed, Fire rate, reload time as a few I could think off my head as it came to me as an idea.
These would all be base affected by enhancements, feats, unique magical properties.
Maybe include a universal formula that determines main/off hand stastics in cojuncture with the weapon type in main hand.
Ergo a Dwarven Axe/Dagger weapon set would have faster speed than dual wielding Dwarven Axes.