User blog comment:Rupert Giles/Introducing Updated Global Navigation/@comment-4812180-20140926024715

I think it is a bad design. Websites with header navigations at this height are blogs or galleries with very few content. They use larger font size and larger margins as well.

Wikia, however, is full of rich content and uses smaller font size. The content space of Wikia is a compact cluster, which makes this header too large to be visually pleasing.