Unless there is a dramatic turnaround at the club, Ozil and Alexis are gone and Bellerin is another likely candidate to follow them out the door. Ox is a doubt too. Kos could also be a target for the big clubs. The club is heading nowhere except in circles and it's not a surprise when players who could easily get more money and more medals elsewhere get itchy feet. It's up to the club to instil some sort of purpose, ambition, direction. Don't see how it will be done given the people in charge.
However, if Ozil is giving less that 100% that's unacceptable because he's still picking up the wages. Until he's gone we need every ounce of effort from him, and the rest. Henry's a bit of an idiot for suggesting Iwobi is ready to fill Ozil's role though, especially on the back of one performance against a dire Palace. And anyway, Wenger sidelined him yesterday so it's not really a case of one player filling in for or replacing another, it's more a random whim sort of thing that I'm sure the manager couldn't give a convincing explanation for if pressed.