Joseph
that was a pretty smug response, or it sure seemed to me that way.
this "problem" has been around for a long time, an people have found ways to work around it.
Apple seems to make it harder with each iteration of the system software to find new work arounds, and no it seems that have completely closed the door.
and it feels purposeful. perhaps you or Apple can explain why this is a security issue, or some such?
the screen saver options are only for certain system screensavers.
i use my photos library, and there are no "options". and as TV-1968 said below, missing are the arrow keys to move through the slides show.
Apple has also removed the possibility of change through "slideshow preferences" in the system folder.
over time, Apple has taken away this really important feature instead of adding to it, enhancing it.
it really annoys me to no end.