Here's the way I'd organise the Wiki's homepage (You're allowed to make fun of my Paint skills, but be aware that my drawing/writing is far worse ) :
big picture
Obviously, there are things that would need additional tweaking, and I'm aware I'm no UI designer, maybe the layout I have in mind just wouldn't work with a game like Factorio.Amongst the things that help readability (imho) : whenever icons make sense, they help make things way more compact and more ergonomic. Example below, I selected two equivalent things in both Terraria and Factorio Wikis :
Factorio version
Terraria version
Notice how despite way more options available for Terraria, The Factorio version is way less compact, and the information less evident (it's quicker to see Reddit's icon than to read everything until finding the "Reddit" world" for example).