I hear this a lot, but I'm always kind of curious what else people want on the home screen? The nature of iOS is such that pretty much everything is done in apps which one way or another are going to occupy the entire screen. There is no real "desktop" exposed like in traditional windows based OSs.
I don't even think it looks bad as is. They could allow more icons but that would look worse IMO - like people whose desktops are packed with icons for files and applications they've never bothered to organize.
Widgets and such have always seemed kind of pointless to me because you can just open the relevant app things are so quick on iOS. Only addition I would like to see would be, in the event Apple introduces a file system, that could be another "pane" on the homescreen you could navigate. I would be surprised if Apple actually did it that way though.