He's not scoring enough and he's not giving enough assists to justify lack of goals. (No **** sherlock I hear you cry. ). If trying different positions doesn't help then try arrow on/off - if that doesn't help......it's difficult to say anything more without seeing his Skill Point allocation.

Imo, when you buy a player you should test his performance before investing.

PS. I too prefer wingers to have MR or ML as it gives more options for formations but I do like bought AMCs to have a winger second role for cover.