I'd love to see on the WPSEO settings for each given page/post on the social tab, the ability to set the image to share (og:image) manually.
The size of my featured image is designed for my blog layout, and not meant to fit with Google or Facebook etc. I have a featured image but it's dimensions dont' work well, I'd just like to be able to manually specify the image to share (og:image) on each page/post rather than trying make a single image fit everything. I have one for my site, and the other will be used when sharing across social sites.