I feel like Rengar already needs to be renerfed. As a player since season 4 it hasnt been much of an issue til recently when i literally have no counter play to getting one shot by a rengar in my game 13 different occasions and not being able to leave my base. I also feel that i am not allowed to even leave the fountain and have gotten one shot multiple occasions in my spawn. Plz riot do everyone a favor and set this monstrosity of a champion right again..... :'(
I'd say his design is the issue, nerfing his numbers will just make him unplayable. Any champion that is able to output their damage faster than a player can react is a bad design cough 
cough. Rengar is no different, his damage either needs to be weaker or he needs to be redesigned with a more spread out damage output. His design is partially because ADCs kill things too fast, so the only successful Assassins are the ones that can insta-gibb players; thats why Talon is not as prevalent as Rengar.
Unfortunately until ADCs get changed (not holding my breath, here), Rengar will either stay cancerous or be nerfed into oblivion.
Before people say "you just want ADCs nerfed!" I will say this: my definition of healthy ADC damage can be summarized by 2 champions, 
and 
. Their damage is dealt over time, and it is potent, but sustained. For me, this is how all ADC damage should be dealt, sustained potent but not going to 2-shot you.
I love how Riot had issues balacing him, they reworked him and now they're bringing back the old Rengar problem again, on top of that Rengar has duskblade which makes him more cancerous.
There's this thing called standing with your tank or support/mid when you see his ult. You shouldn't be leaving the base and walking jungle by yourself and theres also 
that he all cant jump into. Stop crying for poor play.
dude , EVERYONE LITERALLY SHOULD SEE THIS THREAD , Rengar is one of the strongest champions in this game , he is completely OP , and they keep buffing and buffing and buffing and buffing him ? just because he has a low winrate ? dude Rengar can kill like 2 alone by himself , if he loses then it's his team's fault , he can 1 shoot Lulu even before she can w him
Rengars job is to take out carries who still go deep solo without team! The counterplay against Rengar is simple ... just group and he wont 1shot anyone... Khazix is steonger believe me.... Rengar is balanced how he is no... hmm maybe make his bush jump range bigger
im a top laner btw so nice assumptions
His problem is they put ALL his damage into his Q. His W, E, R, all exist to help him deliver that seet Q damage as fast as possible. He used to be this bruiser like diver that could sneak up and stick to people, and actually HUNT them in accordance with his lore and theme. He could take a few hits and pick off stragglers. He was better when he could be built AP or tankish and do well. He was better when his ult DIDN"T alert people when he was coming miles away and he could store his resource charges for later.
The design of him currently is the problem, and why he is all or nothing now.
Ah, well... you probably don't want to see the rengar changes on pbe right now then where he is getting a minor timing buff to his ferocity lock out.
