IDK, i like the new Kat, it's a great start to something, but i think it has it's problems. The main problem being outplaying her daggers.
Anyone with half a fucking brain cell knows, if you avoid the dagger on the ground, you just halfed her damage. She can't kill you by just Shunpoing and ulting, well, unless she got fed, but at that point literally anyone can do the same thing. That's not champ specific, that's just how the game works.
I really think her W is the source of the problem though. It takes too damn long to land to be useful in anything. Half the time i use her W just to get that Shunpo reset, or for the speed boost to avoid a gank, and that's it. It's only ever useful in very narrow situations, like camping in a bush, and using it before they face check the bush.
When have you ever had time to stand there and wait for her W to land on top of her. You're like a sitting duck. And in this meta, that shit don't fly.
Maybe if they up'd the speed that her W dagger hits the ground, or even gave her Q one more bounce again, that would fix a lot of the issues. As of right now, in this tank CC that does damage, and adc right click you meta, there is no use from Kata. Especially since she can't blow you up super fast anymore, combined with support shields for 80% of their HP bar. So bursting the ADC is out of the question more times than not.