This is far from new; I've seen it with the last several releases of Fedora, and keep forgetting to ask about it.
I happen to prefer xscreensaver, which always insists on installation that gnome-screensaver be installed, too. So I install it, and make sure it's xscreensaver that I run.
Often, however, it stops working after a while. When that happens, and I launch it, it gives me two messages. One says gnome- screensaver's daemon, or something, is running, and asks whether to stop it. Given that, it then says its own is not running, and asks whether to start.
I've tried the big hammer more than once -- told yum to remove gnome-screensaver; but it always threatens to take xscreensaver with it.
Is there anything I can do about this usurpation? Or if not, might some developer in an idle moment take a hard look at the dependencies?