Katarina, Are you really an assassin? Please teach me how to kill

SOOOOOOOOOOOOOOOOO.

I have been trying to play with the new Kat for couple of games now. The new kit seems cool and it is indeed a lot of fun playing her. She's like the new kassadin instead of you don't get to chose where to rift. Laning phrase is much more playable than she used to be. Also much more aggressive. Dodging skillshots is really fun. Watched couple of video about how pro players play with the new kat. Include the demon king Faker:

But,

Here is the question.

Same level, equivalent gears, you meet an ADC in the jg.

https://www.youtube.com/watch?v=ZwB4BeSqFbw at 18:50.

The old story line goes like this: ADC runs in fear and dies before he can even move. The new story line goes like this: ADC auto you while drinking a cup of tea and yet you are still waiting for the dagger to drop at the right place. Then the dagger dropped, alone with your pity dead body. [zombie-brand-mindblown] Yes, anyone with full health and some damage is now a threat to you. You might having advantages at least for now, when people still living under shadow of the old kat. New kat is crazy good while chasing. daggers always lands in range and you will always have a way out once you get the kill, even when you don't. (E, W, Q, dagger, then E out). What if your target is fearless and walking towards you? Then you fucked up. Your dagger will never land in range. And if your target happen to have a red buff or something that can slow you down while hitting you in the face, the only thing you can do is dance.

The new kat has such a low threat to AD carries that have strong confidence I can bit the new kat using Just auto and keep the range.

Please, all mighty LOL players, give me some hint how to play this kat????????