The Invisibility Rework Should Have Just Removed Invisibility From The Game.
There is no reasonable counter play to invisibility. As it stands, Rengar can still hop out of stealth, proc all 3 of his abilities at the same time, and then kill your adc before they can react. What is the counter play to this? A necessary component of counter play is to be able to react to what you're opponent is doing. If I can't see you, I can't react to you within the duration of your invisibility; therefore, there is no counter play to invisibility.