I like SlideShare plugin and I use it but before, without the plugin, with the simple embedded function, there were 2 link appearing down to the slide:
1) to the slide page on SlideShare
2) to the author page on SlideShare
this provided 2 outbound links, at my advice, good for SEO.
Yoast, could you please add to the SlideShare plugin the option link on/off?