Besides the garish colors... I don't like that the user interface has lost definition. You don't know whether something on screen is actionable or not. Instead

Besides the garish colors... I don't like that the user interface has lost definition. You don't know whether something on screen is actionable or not. Instead of buttons, there is just floating text. Icons in apps have gone or have been replaced with minimalistic line drawings that are hard to recognize. And finally, I thought they would do something clever with animations and blurring, but in the end it's mostly eye-candy.