I agree. His fascination on cramming everything into the smallest space has left us with Macs that are not worth upgrading. It blows.
His touches on the UI are like cancer since he applies principles from designing hardware shapes (Industrial Design) to UI design and THEY DO NOT FUCKING APPLY THERE. Minimalist UI is bullshit. Context matters. You wan to eyebell the UI and understand what each part can do without having to interact with it.
If text looks just like a button, then you can't tell the difference between an item you can interact with and a static design element that you can't click or tap on. This confuses the user. This creates crappy and confusing UI.
I remember looking in Xcode for the longest time for an option in the far right panel. It just wasn't there. Well, his dumbass design principles replaced the arrow that shows the items can expand next to the text with NOTHING. I had no idea that the item was expandable because the visual cue that it was expandable was removed. I wasted 1/2 a hour on this and I'm not the only one who has.
I could go on, but there are so many cases of this now in the UI. It sucks.
And all the motion in the UI? We are wired to divert our attention to things that move or dart. It happens before we think. Every time an item darts or jumps or bumps, it's a distraction that pulls out attention to that item and away from the task we wanted to accomplish. The UI becomes an ADD machine. It's terrible.
All this thanks to Jony Ive. I say no thanks. When not in the office, I use Snow Leopard (10.6.8) because it's simply so much more usable a UI.