Magic+ two-handed weapons ought to come with, at least, an additional item property.

Two-handers pack a little extra damage into each strike and can take Thresh, and Scythes are stupid, but dual wielders can take Berserk anyway which synergizes ridiculously well with their swarm of attacks, and the off-hand item slot can represent 3 whole extra magic properties, while shield-users have shield bash, higher defense, and will also have extra enchantment slots eventually. It would be good for item balance if two-handers got a little more mojo. Maybe +1 item property and improved values on properties like +damage. Something, I dunno.

Also, if you have not already, please remove the possibility for two-handed weapons to roll useless garbage like Bonus Feat: Ambidexterity / Two-Weapon Fighting.