I dunno, their designs for the last decade or so, before the most recent years, have been entirely unimpressive. Yeah, they're supposed to be known for it, but IMHO their outputs were pretty ordinary and caused a lot of usability issues. Disposable trash-can desktops? Pro laptops with no ports? iPads that bend every which way? iPhones that didn't have working antennas? Whoever was responsible for those, whether it's Ive or anyone else... I just hope Apple is using this separation to turn a new leaf.
So much of design is subjective, but my particular problem with them is that they emphasized form over function so much that their products were unusable in the end. I remember needing a new laptop for a few years, and kept looking at the Mac ones year after year but unable to type on them.
Then, whatever happened in the last 2-3 years has been AMAZING. I thought Ive had already left in some capacity and that was why. Finally, usable pro machines again (still wish they had a USB-A port). I look forward to what they will produce without being under a bad design dictator anymore.