How will twitch be affected by the assassin update?

Hello,I have been wondering this since the post came out,and as a person who is learning twitch and want to make him my main in the adc role when I get it/autofilled and so..

I want to ask any twitch main (or generally any adc main who plays twitch) in what way will this update affect him,as in positively or negatively? since his main ability to get teamfights ravaged is mostly untouched because you'd stay in the backline waiting for a tank to engage away from the enemy,but what about laning phase? one of his biggest weaknesses,since in the mid game his assassin-y potential was 100% reliant on ambush letting you get close enough to the enemy adc to the point where you AA them until they use their escapes you use your ult,but I may have misunderstood and his stealth is actually invisibility...(need clarity pls)

I'm not too worried about itemization because although youmoos was great on him I still think his lategame potential will be hit too much