I generally agree with your post, but if there is one thing that has improved under Arteta its his tackling. Since he came in if he makes them he does so much further up the pitch. Has much more successful ones and times them a lot better. He did a worldy of a perfectly timed one in Switzerland's game against Ukraine denying them a clear opportunity and starting a counter. He's definitely still slow/stiff though and while its also reduced he's still got the tendency of getting bypassed too easily on occasion, I agree.