When a user created or edited a page, it wont publish right away, rather have a admin or higher lever user to approve the modification, then publish.

Support for child navigation items to allow dropdowns in the main navigation pane. If you have a large wiki, it can be hard to organize your pages without some type of collapsible navigation.

It would be nice if users can see newly shared articles on the homepage when they log into the app.

It might be hard to integrate, but it would be a killer feature that no other wiki offers. Perhaps you could use ShareDB: https://github.com/share/sharedb https://en.wikipedia.org/wiki/Operational_transformation

It would be great, to add an embedded way for PDFs.

An editor to describe and document APIs (e.g. Swagger, readme.io , etc.) for both REST and GraphQL endpoints. Ability to automatically analyze a GraphQL endpoint using introspection. Ability to automatically analyze REST endpoints using standard formats (such as Swagger).

I like more customizability in the headers things like mdi/fab/fa icons what is doable with html but not in the headers or just the ability to hide the header for a specific page the header will exist for seo but it won't be visible only in the browse bar or when you search it on google+

Allow a page on the wiki to display which other pages on that wiki are linked to that page.

Depending on the window size, the blue navigation area on the left disappears into a round blue button with 3 horizontal white stripes. It would be nice to have the option to always (independent of window size) have the navigation area collapsed. This would maximize screen real estate in some cases

current table designs is not appealing, would be col if table structure is similar to that of confluence wiki