I wouldn't call a software last updated September last year outdated. Besides, you don't have a choice anyway; xscreensaver is the ONLY screensaver pack and manager available for GNOME/Unity.
Fell free to install it
Remove any packages you don't want from the above list. Then add xscreensaver -no-splash to startup.
sudo apt-get install xscreensaver xscreensaver-data xscreensaver-data-extra xscreensaver-gl xscreensaver-gl-extra xscreensaver-screensaver-bsod xscreensaver-screensaver-webcollage
Also remove gnome-screensaver (which does nothing more than blanking the screen) to avoid conflicts:
If you want Ctrl + Alt + L to lock the screen, run this command:
sudo apt-get remove gnome-screensaver
sudo ln -f /usr/bin/xscreensaver-command /usr/bin/gnome-screensaver-command