I've been playing around with the game since it was available on Steam. An issue I've come across is that you cannot dual wield a Rapier and Dagger, but can dual wield short sword/short sword or short sword/dagger. In 5E, you can dual wield a Rapier and Dagger, so it doesn't make sense that you cannot dual wield Rapier and Dagger here. I don't know if this is a bug with the game, but it's definitely something that should be allowed by the rules based on 5E.