It's true that his win rate went from 46.06% in 7.10 patch to 50.37% in 7.13.
Considering that his win rate in 7.12 was 50.22%, there's no reason for this play rate increment: it was 1.72% in 7.12 patch and now IT'S 4.84%!
I found Corki in every single game in two weeks from now.
I really don't understand why, _DOES SOMEBODY HAS THE ANSWER? _ 
oSEXYPLATYPUSo1 voteshttp://na.leagueoflegends.com/en/news/game-updates/patch/patch-712-notes#patch-champions
Attack speed slightly up. Base AD slightly up. Autos do more magic damage rather than physical.
Last time we saw the Corkster bombing through the Rift he'd been doing so as a midlaner, packing obscene poke damage and wave-clear, a potent arsenal desirable for that role. We made some changes to curb that, but they left him feeling like a whiskey delta. We see an opportunity to help him out: we like him as a magic-damage option for the bottom lane marksman role. These changes are designed to reinforce that by making him a more palatable pick in bot lane, while further pushing his magic-damage niche. Base stats BASE ATTACK SPEED 0.625 ⇒ 0.638 BASE ATTACK DAMAGE 56 ⇒ 58 Passive - Hextech Munitions BASIC ATTACK DAMAGE 50% physical, 50% magic ⇒ 20% physical, 80% magic W - Valkyrie NEWPREPARATION Phosphorous Bomb and Missile Barrage can now be buffered during Valkyrie's travel time
Support Stigma1 votesread patch notes before asking questions like this, it makes you look foolish to state win rates of champions but ignore obvious glaring facts like how the champion was changed to effect those changes. not that that isnt a valid question it just could have been worded much better, rather than asking why is he getting played more ask why he is picked by people who didn't pick him before just because of a slight change in damage type.
Sire Hippington1 votesIn 7.12, he already was strong, but people often need to realise such things, so the big playrate increase kicks in one patch later usually(unless it's big changes like a rework), and he has seen a lot of LCS play, which usually is one patch behind live, so Corki wasn't played in proplay duering 7.12 while he now is.
