Who is surprized by these numbers? Since Cook took over from Jobs earnings are the only thing they're focused on. The product quality, developer experience, user experience,.. everything that made Apple great is declining.
The decline for pro users will continue, I think. Of course a behemoth of 2 T$ won't fail tomorrow
Jobs wanted Apple to deliver the best of the technology that mankind has to offer whereas Cook wants Apple to deliver the best in the market.
Competitors could spend 10 years catching up. Cook simply needs to keep the machine going till he retires.
Tim's Apple look at which market has potential profits and tries to enter it.
It is a product based strategy vs a market based strategy.