I would love to be able to use Library items to be used for Actions.
Specifically in my case I am not able to logos stored in the library to use for Photoshop actions like watermarking/branding. Logos have to be stored on the computer to be used for these kind of actions.
Generally improving watermarking and corner-branding for people like photographers would be cool, as for now, setting up these actions are quite complicated to implement. A corner-bug into a lower right corner on a psd-file, which is cropped, has to be done with the side-step of using the rectangular marquee-tool to specifically mark the document-boarders and not the file-boarders which, until you find out, is kinda intuitive.