Graham Spencer for MacStories, "iCloud Drive: What It Is, How It Works, & Its Fundamental Problem":
Cloud Drive sits awkwardly as a solution to a problem that Apple created. Apple at first tried to avoid implementing a file system on iOS but have now realised that some users need it and have created iCloud Drive in a way that tries to hide what is ostensibly a file system, ultimately making it more complicated. The problem is that files still get stuck in these weird app folders, which frankly makes no sense to me. If I have multiple text editors or spreadsheet apps, how am I supposed to know which app I created the file in? In my opinion, Apple should get rid of these weird app folders and simply save files to the root of iCloud Drive, or into user-created folders if the user chose. To simplify things, apps such as Pages which can only view certain document formats would only need to display those files which it could open. This way, there is no file system unless the user creates one and iOS only displays the documents relevant to the particular app being used. No need to hunt around in the dozens of app folders to find that one file you were looking for. Surely that would be simpler? While I'm glad that iCloud Drive exists --- and upon installing Yosemite on my Mac, I enabled it everywhere --- it still isn't what I asked for. I would've preferred that Apple added to iOS 8 an iCloud Documents app wherein users could search for and manage files; one canonical place in the system where their stuff resides.