Options form at the top of Special:Watchlist needs cleanup.
Right now it features a "form" built with links to show different time ranges, then another to show different kinds of edits, and then another, this time real, form to show different namespaces.
All this should be consolidated.
(There's also a weird header with a one-item unordered list and a huge 'Mark all pages visited' button, but that's a different thing.)
Proposed layout: