...
- Table of Contents zone + sidebar takes up 1/3rd of your screen (but at least you can shove it left or right)
- Version 2.x is pretty static and 3.x is not due for ages even though it contains some good features we'd want (eg tagging pages to have them grouped together, for lexicon stuff)
- Asset manager is not awful but not great
- Importing from Confluence will involve some manual work, some things might need to be reformatted
- User management doesn't look great
- Limited customisation options (eg navigation/toc bars) and no plugins
...