you need to check on what makes a weapon "do" damage.
A blunt sword does not do the same damage as a sharp sword but as "crushing" instead of "slashing" damage.
The process was normal in ME, and was called "rebating", and was used to prepare practice weapons.
To be effective like a mace, you need a heavier weapon and one which focuses the impact (typically to a more or less pointed spike or flange)
The spell proably reduces swords to (say) "half damage"