Heck there were even EXTERNAL projects with no direction, like the Apple TV (still flailing around), the Apple Cloud offerings (only got robust in the last 2 years or so, and the most touted part back then, the "office"-like iCloud apps are universally ignored), the Apple boom box, and other things besides.
Supposedly the iPod launched with a idiosyncratic equalizer, apparently tuned to Jobs tastes.
I think idiosyncratic also describes Jony Ive -- but as a pundit (possibly John Gruber?) put it on a podcast recently, Jobs was a better editor. He was good at zeroing on what made designs work rather than merely beautiful. If I have any major criticism of the post-Jobs Apple, it's that they seem to prioritize aesthetics over functionality. I know that's a knock that critics made against them long before the Tim Cook era, but I don't think it was really true until post-Forstall.
(And no, I don't mean losing the headphone jack. I mean more things like the entire UX of the new Apple TV, from the beautiful user interface which makes navigating through multiple seasons of a TV show an endlessly scrolling nightmare compared to the previous model's design to the thin, elegant, ergonomically disastrous remote control. Ive seems particularly drawn to the notion that thinness and symmetry are more important than usability.)
A lot of apps let you select the season from some sort of "drop down" or display a list of seasons vertically and let you scroll through individual episodes horizontally within that season...
[1] http://appleinsider.com/articles/16/01/25/apples-project-tit...
I believe that a creative type like him has trouble operating under the demands of a corporation like Apple at that level, and that he did so for so long because his collaboration with Jobs was very intense and personal, and that this is not something he can have with Cook. Under Cook he is supposed to be the one who replaces Jobs in that role (while Cook is an execution guy.)
I believe he is participating and staying around only so long as necessary to get things ready for him to leave.
He's earned a retirement and some time to follow interesting design work that is not relevant to Apple's business.