I mean, I can't disagree with your mood based on the current form of Arsenal...but many players who left Arsenal during better times haven't fared well.
Aleksandr Hleb, Fabregas, Van Persie (yeah he won the title with United, but then fucked off to nowhere).
Oh I know. See, since I'm chilean, I'm not an Arsenal or Man City fan, but an Alexis' fan.
I just want him to play in a great team where he can do his best and have actual chances of winning something important, it's pretty clear he is not going to do any memorable if he stays at Arsenal (sadly).
But you're right, maybe he will fail miserably at winning anything with Man City, who knows, the thing is with Arsenal we know for sure he has ZERO chances. So, I want him to be as far as possible from Wenger.
Regards.