There seems to be a craze still about official device wallpapers these days which is fine,personally I do not use them but lots do,there is also an array of other options available out there too to change the look of your device be it images/backgrounds or launchers. PolyWallpapers is a simple example with a selection of images to chose from and is easy to use and you can pick from a few designs and then download the said image.
•Beautifully Designed Wallpapers
•Save the wallpapers to the device
•45+ Beautiful wallpapers to chose from
•EASY TO USE
•Choose from different categories of wallpapers – Material,Minimal,Abstract, Low-Poly