You have to appreciate what Cook is doing. Most CEO's in his place would let things run their course and think that they would stay ahead of all other competitors (ex: Microsoft's Balmer). And then realize that others were running past them.
But seeing what Cook has done just in a couple months, with the turmoil between the vice-pres. team. It took a lot of guts to figure out, an implement a change to keep a certain innovation needed. Of course Forstall would be a good fit, but only if he would compromise and make it possible to work with others. (I still think he will return with his tail between his feet)
And now, Cook realizes that what really made Apple what it is today. Was the storming sessions that Jobs had with his creative talent. They did not know exactly what would come out of those meetings, but Jobs probably had an idea of where they needed to go. So those were probably the 10 items he would chalk up, and then the 'TEAM' would figure something out. Most were not good. But it only takes a couple great ideas to follow up on and make them successful with everybody else on board.
Now Cook realizes that that type of ideas will be needed for the near future, in order to keep Apple ahead of everyone else. Sure, some will say that they are following Google's example. But, that is not quite the same thing. Apple's ideas are more concentrated. There is no reason to stray so far away from what they do best.
But again, the leader at the top. If he is devoid of good ideas, the best thing is to let others do that. He seems to have a good enough mind to be a part of a decision of what direction to take. One thing for sure, he does not have very much competition with other CEO's at other companies that are in his field.