Arteta's ability as a player at any club and how good he was for us are completely irrelevant to how good he would be for us or any other club as a manager.
My issue with him being appointed as a manager is...well, he has no experience as a manager.
It's crazy to even think about appointing him to a club at our level (and I hope no-one questions what our level is, what's with all the self-harm amongst Arsenal fans, we're a massive club)