When the iPhone was released in 2007 with a "desktop class" web browser, it was widely praised. You could view entire websites on a mobile device. Coming from the days of WAP optimized sites on my Motorola Q, this was incredible. If we fast forward to 2014, Mobile Safari has become the app that is holding the iPad back from becoming a fully featured laptop replacement for a lot of people. While Mobile Safari is fast and loads website reasonably well, it cannot upload and download files. It can upload pictures, but that is it. Mobile Safari needs a way to upload and download any type of file into iCloud Drive (a mirrored from the Mac downloads folder).
Android does this almost since it's beginning, and, even if it's implementation can be messy, it is very helpful. This should be on the top list of iOS development (after bugs squashing, of course).