You are just obsessed that he played CM at Udinese and isn't in his "natural position" like that is even a real thing. This is evidenced by your desire to have Armero instead because he is a "natural LWB". Schweinsteiger started as a fucking winger and is now a top DM. Go figure.
He has as many or more assists than Pirlo so far, obviously some crosses are finding their mark.
He had at least 3 great crosses today. One for a goal, one a near goal and one was whipped into the box perfectly. He went by Ivanovic like he wasn't there on at least 2 occasions with just pace to get in crosses. I guess you expect perfection. It's not like we play in the EPL with heaps of room where you can dribble wherever you want. We play teams that have 8 men in the box, not even Ronaldo could "cut in" from that spot but you expect a LB to.

Never played football before.
Not to mention he is a brick house defensively.