Missing Link, Copy Path in Link Info - Path:
Under the LINKS in Link Info, the Path:(s) Location we should be able to select and copy to ease relocating and relinking missing files
Vincenté Wilcox commented
The Links panel, truncated path name, and ability for Indesign to find links in general is such an issue for me I'm going through and voting for all these issues. We're too far into the development of these programs to have the issue where we can't see the complete path filename unless we hover over it in the Links panel. Which doesn't work once you actually try to relink the file.
I would encourage Adobe to look at Apple's Final Cut Pro for how to best manage and search for links when broken. Unfortunately Aperture lost to Lightroom but that had an excellent file management system and handler of broken links.