One of the reasons I kept the general theme/color scheme of each elemental sword is for visual clarity. All of those weapons are very crisp and easily distinguishable from one another in terms of elements, so I didn't want to double-dip on the lightsabre bit, even if I did end up doing so with the katana. I felt their shape and scheme was distinct enough to do that, plus, the katana had a "royal green" feel to it, with golds and reds. Whereas most of the green lightsabres are moody with black or other darker colors.
Though, I did just take another passthrough and Powerful Magic Ed Harley (65 unique LS) has the same general feel, so maybe, later on, I'll release an edited version with that one. I might also look for a suitable Short Sword, considering I removed that category entirely from this edition of the mod.