Images should be pasteable via clipboard ctrl+V as a shortcut, similar to how Github's MD editor works. This would be a gigantic time saver.

When sharing link on social media theres no thumnail. When we edit a page description it would be nice to have a picture selector for the thumbnail

Blocks with navigation and activity logs take up half of the screen, which is very inconvenient. As a solution, you can make a small button at the top to dynamically collapse these two blocks.

Ability to dynamically list child pages or siblings of a parent page. Perhaps with {.links-list} style. Would be very useful for landing pages for example. Exemple with WordPress: https://wordpress.org/plugins/page-list/

Give the option to change favicon via administration

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.

Currently when moving or renaming a page, all existing links point to the old page. The correct behaviour would be to update all links to the new page, either optional or explicit.

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 good for the administrator to be able to select default date format and timezone for the entire site. Same way as the administrator is selecting the default theme.

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