There is a difference between playing well for 90 minutes and scoring a goal. Yes the goals assist the team but he very seldom puts in a good 90 minute performance. He is often caught in possession, does not track back not that he probably does not want to, but maybe because he has the starting speed of a snail. When Digne made that run into the penalty area Kean exploded between the two defenders and left them for dead hoping for a cross that didn't come. Gylfi no chance in the same situation. He's ponderous in possession too; just my opinion.Just imagine if he did....he would be on 25 goals per season instead of a measly 14 goals that no one else surpassed.