Instead of just the "what links here" link, also include the one to the external tool that shows just redirects
I was frequently wanting to see, on Wikipedia articles, a list of the other Wikipedia pages that redirect to the current/main one I was looking at. Such a tool existed, but it was a two-click process to get there. This script creates a new link, under the "Tools" section of each Wikipedia page, which points directly to the list of redirects.