When it's all said and done, the next manager isn't going to be standing on the touchline for years to come - if he doesn't perform well, then after 18months or a couple of years he'll get the boot, and if they do well they'll still end up going to another club eventually - we've joined the managerial merry-go-round like everyone else. No manager we're linked with has been universally successful, there's zero guarantee anyone will do better or worse than Arsene and we're not going to have a better chance of attracting top tier players all the bigger clubs want any more than we did.
There's obviously a degree of trepidation with Arteta because he hasn't managed yet, but there's always plenty of positives; he knows the club well, knows the players, is well-respected by a lot of people in the game and apparently isn't one for putting up with ****, has strong ideas about how he wants the game to be played and what he expects from the players... and obviously has spent 2 years soaking up knowledge from Pep who wanted him at his side in the first place. At the moment he's just an unknown quantity but seems the front-runner so... we'll see.