Two changes I'd like to make:

a) Always use the simple "icon-based" UI for page review status and remove the preference to control with UI is used. Having some wikis use the old one and some the new one seems like technical debt, and a fair amount of code can be removed.
b) Remove the logged-in/logged-out distinction that decides what version the user sees. It should always just be whatever the site/page default is (overridden only by the preference that exists already). The distinction is to artificial and unexpected (Brandon H and Howie F never liked this either).