[Fern]

Two Hand is not increasing your Scaled Weapon Attack. You can replicate this by investing into the talent and grabbing a Longsword, or any other weapon that's supposed to be compatible with Two Hand.

There is no damage difference with and without the talent. Tested via skills/basic attacks, additionally the Character Info screen shows no difference in the SWA calculation.

Nothing changes if you make the weapon 20 weight either.