Regarding front page

Just because you use it doesn't mean it should be on the front page. I challenge you to find any site that has that much navigation linking on the front page. Unless you are a slow typer, search will almost always be faster and if you use Chrome (possibly others), you don't even have to visit the wiki to search. You just type in the wiki URL until it comes up on autocomplete, hit tab, then type your search term. The actual search box on the website does autocompletion on pages and so does the Chrome search, if you do what I described above. If you visit the site by bookmark, then you can always bookmark a new "Site Map" page or something like that. There is also a fair bit of redundancy between that blob and the left menu navigation.

That being said, even though I rather dislike the navigation, there is no mandate to remove it unless something better appears.