Dules, I can see that. We saw Alexis try to do everything himself yesterday. That's because he doesn't trust his teammates to make anything happen - he knows he's in a different class to them.
This is probably an unpopular opinion, but I'm ok with letting Ozil go. He's a luxury player in a team of galacticos (which we don't have). He's not a fighter, and he goes missing in big games (at least for Arsenal) far too often.
One of the reasons we never truly challenge for the league is we are full of players who only play well when their teammates play well. At some point, you need players who will take charge and actually make that happen; in other words, who are drivers, not passengers.
Ozil is an incredibly talented passenger. Great attacking midfielders are plentiful. And tactically, I'm not sure I want us to rely on playing a 10.