This is actually something I agree with entirely. Chychrun fits the idea of the Kings needing a LD, but he's another offensive type and that's not something the Kings lack. I think that's the strongest argument against LA trading for Chychrun, they're better off using those kind of assets for a better fit if they're paying that much.
That's the argument I had with Chychrun with other Penguins fans, in that he's very redundant with also having Letang and Petry on the same team. But at this point, their defense is in such bad shape that I'd take any upgrade possible
That's also why I like the idea of Chychrun in Edmonton on paper. Slide him onto the 2nd pair with Ceci and I think those two complement each other really well.