"We're buffing Kayn because he relies on Duskblade!"
... now remind me how many times I've even seen Kayn do badly, without Duskblade. Oh, what's that, not a single time assuming the player behind him wasn't a vegetable? Wow. It's almost like, whether you build lethality or not, he is a fucking god.
Oh but that's right, he's a weaby edgelord that has a lot of money making potential, so we have to keep him broken, right?