It’s often been brought up that dual lightsabers is far superior to saberstaffs, such that it’s not even worth using. I imagine the same also applies to twin swords and double axes. This is due to the fact that you can get an extra slot for stats by dual-wielding, which makes a second weapon automatically “best in slot”.
My suggested solution is to disable any stats on an off-hand weapon other than Attack Bonus and Damage. We’d need to apply the same limitation to shields (make it so attributes other than CON can’t be put on a shield, for example).