Background information about Wiki Organisation
Packt Publishing have a series about MediaWiki Content Organizing Features, including
Of these three the first two are directly useful for this project to reorganize the wiki to make it easier to use. Namespaces have been outlined. The whole area of Categories needs to be explored, along with Templates. Encouraging the better use of Sections, Lists and Tables.
Should the wiki be transformed into a Sementic Wiki?
The semantic nature of it may enable easier use. (Read the Intro to Semantic Wiki )