There are very few swords in the random rolls loot pool and there are even no new swords perks that are introduced in the game to make them interesting.
Also, is it me or do swords still don't have this ability to launch your character forward when you swing?
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They feel powerful to me since the last buff. I've been running Worldline Zero a lot so launching forward isn't a problem. Perks I look for on a legendary are Tireless Blade and Assassin's Blade.