Due to a large number of complaints, general and specific, regarding the Chemtech Drake map, Riot are doing everything in their power to put out the fire of their own making. One of them is Rengar and his viability.
Rengar is a ferocious vastayan trophy hunter who lives for the thrill of tracking down and killing dangerous creatures. He scours the world for the most fearsome beasts he can find, especially seeking any trace of Kha’Zix, the void creature who scratched out his eye. Rengar stalks his prey neither for food nor glory, but for the sheer beauty of the pursuit.
On the Rift, he is the bane of all bot laners, with very little in the way of stopping him, as no leap or cc can save you once he has his eyes on you. However, his kit is reliant on bushes, as the leaping interaction they give to his auto-attacks.
The new Chemtech Drake map is even worse than the Infernal Drake one, as it removes twelve bushes that Rengar not only uses for making picks on enemy champions but also to farm camps. Riot are adding a new passive to Rengar's ultimate to fix this.
Hide and Leap: Innate - Rengar can leap to enemies with his next basic attack when he is in camouflage
As the Chemtech Drake map zones are camouflage ones, this will make Rengar even more dangerous than before. It must be noted that, as stated, this passive is part of his ultimate ability and not his passive ability, meaning that it will only work from level 6 onwards.