Changes to weapon enhancement rules
 

So my GM has a home brew rule change. Instead of weapon enhancement bonuses doing +1 attack and +1 damage, they do +1d8 damage instead. Is there a way to adjust this?

Use the Weapon Damage Override adjustment to add a die bonus to your weapon So if you want your dagger to do 1d6 +1d8 You would select Weapon Damage Override and put the total amount of dice in it.