I don't quite buy people like Bould excusing themselves by saying they aren't given the power to change things. If you're a defensive coach and you're not allowed to sort out the defence, you leave. You don't just sit there, year in, year out, like a lemon.
Lots of Wenger's staff have contributed to the malaise by sticking around, picking up their pay, and never challenging the man. He's not single-handedly been responsible for his team's decline. All of those twits sitting either side of him, doing nothing but shrugging their shoulders and rolling their eyes, have played a part, too.
Mind you, I think Wenger is going to do what George Costanza did in Seinfeld - after he's finally left the job he'll just turn up again as if nothing's happened.They'll have to move and change their name to escape him.