Buying an American team hardly constitutes worldwide recognition in a footballing context. There are probably few people who are even aware of this relatively speaking.
The trouble with Ozil is that he's not the type of player that's ever going to take a game by the balls. As classy as he is I don't think he's someone Wenger should build a team around.
First touch is still a bit iffy compared to what it was, but he seems to be getting some of his burst back, which people thought he might have lost after his injuries.
Regarding the Newcastle game, a player in an offside position is not allowed to gain any advantage by being there, so if the ref has judged him to be distracting Hart, then it's a fair offside decision.
The lad won't even commit to a national side, you think he's going to show United any loyalty? If Madrid or Barca came in for him he'd be out the door.
I don't think you have to worry about his development, if I were I would be more worried about a better side coming in and taking him off you. We all know contracts mean shit these days.