I was rather frustrated with the loss of the sidebar on all screens. It was a fast and efficient way for me to move things to my iPod and my iPhone. (I never auto sync, since the 160 GB capacity of my iPod Classic can't hold all of my music. With all of my podcasts, audiobooks, videos and music, my iTunes library takes up nearly 600 GB of its own 1TB hard disk.
It wasn't until this morning, when I tried to move two of my latest Audible audiobooks to my iPod that I discovered there was a way to drag and drop items without having to sync.
This sudden change reminds me of the frustration Microsoft users have faced a when their interfaces were drastically changed. When controls and functions are moved from locations where people almost instinctively go, it makes for a very stressful time. Even now, after 18 months of using her new Windows 8 machine, my wife screams when she tries to find things on her laptop. She's reached the point to where she'd rather use her smartphone than turn on her laptop.
I personally think this "We know what you want better than you do, and will install it for you any way" attitude has now left the Microsoft world, and is now part of the Apple mindset.
The screams and frustration over the iPhone 6 release is another example... one would think that the number of people that jumped on the larger smartphones made by Apple competitors would have been a clue for the demand for the 6 and 6 plus, but Apple seemed dead set on the notion that no one would want a phone that big.