Seems like "you can wield any weapon in one hand" and "you treat any weapons without the heavy or two-handed traits as if they had the light trait" might cover it?
I would just not change versatile weapons. Their die sizes don't increase because they get bigger or smaller, but because of the leverage of your extra arm. There's no point in one-handing a longsword anyway when you can do the same with a great sword.
I need help with the wording of a custom feat. The 2nd line is really clunky.
You can now use two-handed weapons or gain the use of the versatile whilst wielding a weapon in one hand.
Weapons without the two-handed trait and versatile weapons using the smaller damage die gain the light trait.
Seems like "you can wield any weapon in one hand" and "you treat any weapons without the heavy or two-handed traits as if they had the light trait" might cover it?
I would just not change versatile weapons. Their die sizes don't increase because they get bigger or smaller, but because of the leverage of your extra arm. There's no point in one-handing a longsword anyway when you can do the same with a great sword.
My homebrew subclasses (full list here)
(Artificer) Swordmage | Glasswright | (Barbarian) Path of the Savage Embrace
(Bard) College of Dance | (Fighter) Warlord | Cannoneer
(Monk) Way of the Elements | (Ranger) Blade Dancer
(Rogue) DaggerMaster | Inquisitor | (Sorcerer) Riftwalker | Spellfist
(Warlock) The Swarm