I am all for more vibroblades, techblades and polearms (tech/electro, vibro and lightsabre) - never said they were 'not a thing'. What I am against is "Samurai swords in space" which is my reading of what the OP wants - a katana with a glow on it. That simply doesnt fit for me and isnt supported by the EU (which isnt canon anyway). Change it up, make it like the KOTOR ones - fine. Base it loosely off a katana - also fine. Take a katana and simply add a glow? Not fine, go play another game.