Board Thread:New Features/@comment-20644-20170522203248/@comment-26939370-20170526080330

We will no longer be allowing most forms of CSS and JS customization to the headers. Please clarify what you mean by "most forms" because both CSS and JS can provide a very wide variety of changes and we don’t want anyone tripping over anything accidentally.

We've opted to disallow this type of customization not only to ensure design consistency across Fandom but also because of the simple fact that it's a bad design practice and hinders the user experience. The problem with thinking in terms of consistency is that those thoughts focus purely on the design and the user can get lost. "Is what I’m designing consistent with other things we’ve designed (or others have designed)?" is the wrong question to ask. Instead,"Will the user’s current knowledge help them understand how to use what I’m designing?" Current knowledge is the knowledge the user has when they approach the design. It's the sum of all their previous experiences with relevant products and designs. When you think about consistency, you’re thinking about the product. When you’re thinking about current knowledge, you’re thinking about the user. They are two sides of the same coin. I've just noticed that the designers who spend more time thinking about the users are the ones that end up with more usable designs.

The thinking admins tend to have in adding in fourth and fifth level options is that more navigational links leads to more visitor engagement. This is not necessarily true, navigation bar links can be as simple as categories breaking down, to the simplest form, such an example would be on the SU wiki where they give links to what a "fusion" consist of.

That is just what I think, though.