Simple. It is Tim Cook. He is an unproven CEO. Matter of fact all he has proven is that he can have the company fall in earnigs for first time in 10 years. Say sorry for maps and to china. Be an entire quarter late shipping imac.
Nobody takes his word for great things to come. He has no credibility at all. He actually is a negative to Wall Street. Having just neutral credibility would be a step up actually.
Apple needs a new CEO or at least COO that behind the scenes does the visionary stuff and heavy lifting if cook unwilling to give up his title.
My vote is for apple to buy Yahoo. Do it NOW. Get all their assets, traffic, engineers. Build up web services. Most of all get Marissa Mayer as CEO or COO to be the front for Apple. Cook cannot do it and wall street will never let him.
Yahoo went from 15 to 25 under Mayer. About a 70% gain in short order. Just having her there with her know how for apple to beat up on google is enough and a game changer.