I don't know how important or essential they are, but these apps are missing in Fedora:
Thanks for taking the time to make this list, however I doubt there is value in adding these apps simply because they exist. Now if there is a specific use-case for one or two, I could add those to xorg-x11-apps, but adding them all just because they exist seems counter productive.
xrandr sets resolution modes.Have a game crash on you and you will see the need for it to reset your screen resolution.
xdriinfo is used similarly to driconf, it helps with diagnosing issues.