It would look cooler if the WHOLE weapon was just a darkness glow and you couldnt tell it was made of 'materials'!(like the whole weapon was elemental)
I really wish they hadn't scrapped the concept of being able to charge the Reaver with any element. The basic concept persists with the Fire Reaver, but all the rest went the way of the dinosaur and could only be accessed with cheats. Damn shame.