Quinn needs nerfs. A side from all the other adcs Lethality abusers
We can say
is one of the few champions that shows how dumb Adc's can abuse
line right now.
A side from Quinn that abuse it.
We have a problem with Jungle that is also an ADC user. 
Not only that,
that can one shot tanks (FUCKING TANKS)
And
is right now the Top laner's worse nightmare because of how too good her kit is.
She might not need a damage nerf, the problem is her roaming power and how short her Ult cool down is.(3 fucking seconds with a 2 second channel that totals for 5 seconds to watch out and that is just retarded as hell.)
Damage aside, She is fine enough but its her movement speed on her ult is making her the nightmare to face because the moment she recalls, you have to warn your other laners because she will gank them until its too late for them to react.
Her movement speed from her ult is insane. It Gives 70/100/130% movement speed, no other Item or any other ult can give amount of movement speed in the game.
Riot, Please nerf her for the sake of the game and she has a good chance to be pick or ban in the up coming patch.
.
The examples i mentioned are actual ADCs. worst case senario is they change Lethality into Melee only or some penalty for ranged champs that will mostly shit on Quinn because of some changes like that.
against quinn top. Ez peazy. Just avoid her fkn bird. Unlike
and etc she has damage steroid per hit in her passive thus she is more able to burst faster. With lethality and her insane MS this is just dumb af. The others are good against tanks and quinn's passive is good against squishes.