It would also separate him from Captain America (shield), Daredevil, Batman (batarangs/gadgets), Ironfist, etc. It'd truly be his own thing that distinguishes him.
Also for consideration: since i loved ninja scroll as a kid, it'd be cool if the longer vibranium swords like what Killmonger weilded had the same energy disperse properties as the suit. Each time you clang or parry another opponent's weapon, your sword charges up with energy until you decide to swing the sword hard and have the purple/gold energy cut through the air like a projectile. I don't feel as strongly about that version but it's worth the consideration