As vayne main, this is how you should nerf vayne.
I am tired of seeing lvl 7 lee sin every game I pick vayne for some reason. Or how much my bb is banned everytime I get my role. Or see people first time vayne ranked and get penta becuase why not it riot everything is possible.
The most hated ability is the Q damage, she got buff for worlds because why not? And this beautiful lovely marina joyce preseason update is making Vayne even easy because
or whatever is the build that I cant try because it not December holiday and 2 patches will flought by and Riot will nerf Vayne W Instead if what making her strong.
No I did not forget the Big D That vayne is allowed to get. 
CURRENTS -: . . .
Q- Tumble - COOLDOWN: 6 / 5 / 4 / 3 / 2 Cost: 30 Mana Range: 300 Vayne tumbles, maneuvering to carefully place her next shot. Her next attack deals bonus damage. Rolls a short distance. The next basic attack within 7 seconds deals 30/35/40/45/50% Attack Damage bonus physical damage, equal to 30/40/50/60/70% of total Attack Damage. . . .
What The nerf will be :-
Cool down : 7 / 6 / 5 / 4 / 3 (1 second extra) Cost : 20 / 25 / 30 / 35 / 40 mana (low mana early but increases as you put points)
Or
The next basic attack within 7 seconds deals 30/35/40/45/50% Attack Damage bonus physical damage, equal to 25/35/45/55/65% of total Attack Damage.
(She uses less total attack damage)
This focus on her tumbles so she doesn't just spam in lane, and you can punish her for using her q or delay her late game power spike since she must put more points into Q than W earlier otherwise she can be caught easily because of the Q cooldown or bad tumble. This makes her more risky champion in early. And can not one shot your enemy zed instead of zed oneshotting her.
Or both I don't care nerf her R to inflict damage to herself instead of enemy so she can be able to have unique style ability of killing your self . But as long no "omg nerf vayne rito 5 ad from vayne is 2 little plz" vayne complains are here. I will be happy, with leblanc and zed botlane in ranked promotion lovely lcs ranked flex while I am IN A FUCKIN PROMO peaceful and enjoying playing ~~AP ASSASSIN WTF DMG VAYNE E TRUE MAGIC DAMAGE 1 SHOTS ENEMY TANK ~~ ad vayne.
Thank you for reading my post. Thank you guys so much <3.
And thank you for your BUFFING VAYNE POST LOLOLOL downvotes/upvotes .
PS- This is literally an opinion no hates I'm vayne main, never mind you all hate me for maining her anyways but I wont expect riot to congratz me and say "You will be the first 5 year old to join our balance changes, do you think we should buff yasuo?" in comments.
PSS- Thank you again. IF you ever read because I dont know Titlebaits, and this will probably reach most downvotes in world.
PSSS- Sorry for any mistaks sometimes I just write this by accident because I am not used to new keyboards or I miss clicked?