LOL Tim Cook probably has more talent, smarts and common sense in his pinky finger than most people here. But of course everyone else knows better.
Sure, you know it best. Since TC took over, there was the Browett thing, the maps thing, the .... thing, the yyyy thing. All in about a year. He just does not seem to get involved in day-to-day operations as much but delegate. That is my explanation how the map thing could happen. Didn't he try the maps himself before release to see how flawed it was? Didn't he breath and sleep with it before release? I found it cheap to fire the maps guys upon that. It is a CEO's own fault if somebody under him messes up. It is his responsibility to be on top of everything, not the VP's.
I am pretty sure he is brilliant at supply chain stuff. I am not so sure about his talents as a CEO.
And, ultimately, it is Jobs mistake to not select an appropriate CEO before his death.