Yes he has cheated, let him be and play the game how he wants, he's just cheating himself. But please do not make posts like you've achieved something by cheating, it just makes you look like stupid.
This guy is much better than Emre Can, Necip Uysal, Ilkay Gundogan etc. etc. He is the best Turkish MC after Nuri Sahin in my opinion. (Excluding regens and Mesut Ozil)
Willian can play equally as an AML and AMR so you wont lose anything. But don't play a winger/IF as an AMC or they will underperform. I suggest a natural AMC such as Pastore, Ganso or Lucas Moura.