Everyone has UI woes. Users want more controls on the dialogs, or they want them simpler, or smaller, or larger, or combined, or split. The thing you think makes perfect sense they refuse to understand. But it could be so much more complicated. Take this insightful post on the Shell Blog about one of the games that has come with Windows for as long as anyone can remember: Minesweeper. Some folks who use Windows don’t actually think that mines are funny things or that avoiding them is a game. Well, probably if you asked them, most people would agree that mines are bad, but for some people it's a far more personal and upsetting reality than for others. (BTW the mines in Minesweeper are apparently water mines, not land mines, but that doesn’t really increase the fun factor.) So they changed it to give you an option to find flowers instead:
Be sure to read the whole post to understand why that was only the start of the work involved.