The Celestial Toyroom/Why is the wiki still so ugly?

From Tardis Wiki, the free Doctor Who reference

I know that Tardis Wiki was involved in some beta test of Wikia's new format a while ago, but I'm wondering why the wiki has been reverted back to its first form. The navigation bar, the infoboxes, the margin of the articles, they all look odd. Why has this not been fixed yet?