^ I agree with you, apart from the first part. I feel like Afellay is less predictable when he plays from the left. When he plays from the right, he often seems to always try to beat his defender, but when he plays from the left, he sometimes moves to the center, to link up with Iniesta, amongst others. And since we haven't got someone who can beat defenders in the air, it doesn't matter that he'd be placed on the 'wrong flank'.
Sometimes I feel like he drops to deep...I remember him collecting the ball from Abidal at one point. I think that it would be better if he stayed in more advanced positions when he plays as a winger. It's not like players like Iniesta don't collect the ball...besides, someone has to run into the zone vacated by Messi, and it can't always be Pedro (or Villa, if Afellay comes on for Pedro).