Google Experience Launcher:
I found a way to get most of the S5 fingerprints off of the phone.
Easiest way to install is to download the launcher (file size 11.82 MB). No need for the "google search app" since it is already installed.
No root required - APKs are signed by Google, are safe to install and were not tampered with in any way.
Now you have a "nexus" like phone complete with wallpaper. Camera (and other apps) as well as the system tray are still Touchwiz.
Samsung's magazine app (left of the home screen) is also replaced by "Google Now".
Best of both worlds.