You guys are over looking one thing with iCloud accounts
My wife and I use one icloud account also and we use it for a reason and for what it is intended for. Our Grandson only has a iTouch for him to iMessage us we all need to be on the same iCloud account. If my wife had a different iCloud account then me and my Grandson then he wouldn't be able to text her or facetime with her. So there is a valid reason to use one iCloud account and that was what Apple intended it to be used for.
My wife and I use one icloud account also and we use it for a reason and for what it is intended for. Our Grandson only has a iTouch for him to iMessage us we all need to be on the same iCloud account. If my wife had a different iCloud account then me and my Grandson then he wouldn't be able to text her or facetime with her. So there is a valid reason to use one iCloud account and that was what Apple intended it to be used for.