Something closer to Frostmourne would have been great but I like the Blades of the Fallen Prince. You can't really convert a two-handed sword into two one-handed swords exactly without them looking disproportionate. If the first two skins had a color variation with an identical color palette to Frostmourne and other runeblades from wotlk, it would go a long way to creating the feel that these two swords are the byproducts of the Lich King's weapon. Might be something worth bringing up to the art team.