Don't forget that in many ways some real wikis like Dokuwiki are simpler and more user-friendly than Confluence:
- you can edit a paragraph without locking or creating conflicts for the whole page
- it is much faster, and as far as I can see the observe–orient–decide–act loop is a real thing and should be taken into account
- much better wiki syntax (compared to old Confluence)
- trivially extensible so you can create forms and other helpers to make it simpler for users to do the right thing
- if one absolutely need it I think there exist at least one wysiwyg extension for Dokuwiki