Since you've been doing lots of maintenance around the wiki I wanted to teach you a neat trick; you can get some wiki editing tools to make things more efficient. For example for replacing the COTW links, I've been using MassEdit, so I can find and replace the old link with the new link at multiple pages with a single click, instead of manually editing each page.
Thats amazing! I've been using a mass deletion tool on other wikis I work on to remove unused images, but struggled to find other similar tools. Thanks for letting me know about this! All the time I've wasted... hah!