Look, I love Apple. I love their hardware. And I love the idea of iOS and OS X. But sometimes the software is not up to scratch. I like easy, simple and intuitive. These OSes do what I want. But easy doesn't mean you have to hide things thoroughly for the user. Sometimes easy just means going back to the simple roots. And iCloud Drive is something that is not easy to grasp as it stands now.
Files and folder will always be there in the OS. Give us the option to manage iCloud Drive in simple files and folder without strange abstract ideas -- because I find the document app relationship hard to grasp. Sure, Apple does certain things because of the security sandboxing. Also, I like that everything gets encrypted server side, unlike Dropbox. But there's a lack of thought at Apple of how simple things can be. How more user friendly things can be. By hiding things too much, by removing the user's option to manipulate data in a one-to-one fashion, the user has to search for functionality in the strangest of places.
Good user experience is about giving users the easiest way to get from A to B. To have to go through hoops to delete a folder, and then it fails to do so, is not good user experience. 🙁
Focus Apple. Focus on the user experience. In some sense, iDisk was a better experience. Yes it was slow, but it was easy to grasp. iCloud drive is what it is because Apple tried to transfer the iOS concept of files to the Mac. But in doing so they created a broken thing on the Mac, in my opinion.