And, iCloud integration makes it all worse. Purchased content sometimes disappears into the Cloud, sometimes it doesn't. Right now, my purchased copy of Zero Dark Thirty exists on my iPad - and nowhere else. Not in iTunes, not in my backup folders, not in the Cloud, and not as an available download.
There was a time, around Snow Leopard 10.6.8, where everything about my network and my various clients "just worked". This is no longer true, and that's a shame.
The user interface over the OS X Public Beta to Yosemite time period has not had a consistent design philosophy - from Aqua to brushed aluminum to translucent to 3D to the current kinda brutal, flat 10.10 icons - it's hard to see a guiding hand in all of that.