I've recently started using Notion and I'm surprised at few things that I find incredibly annoying with it so far. Since it seems there are some Notion staff here I'll take this as a change to give some feedback to hopefully improve the product.
* No read-only mode. I like to have documents default to a read-only mode so I don't accidentally typo random characters, or delete something when try copying. etc.
* No floating table of contents. There is a ToC block but it's at a fixed position, where it's not terribly usable especially for long documents having a giant ToC at the top isn't great. I've tried using columns but it just squishes the rest of the document way too much
* Floating heads. When you have multiple collaborators the avatars zooming up and down the left side of the document is incredibly distracting. I'd love a way to disable this completely. I don't care where in a document other people are reading.
* Database/Table horizontal scrollbar. Almost every database in our documents end up with this giant scrollbar that spans edge to edge, looking like a horizontal rule, breaking up the visual flow of the page significantly. I keep thinking it's some kind of page break.
These are just some of my initial impressions. I do think it's a very visually nice product and has a lot of neat features but I'm pretty surprised by some basic QoL stuff missing and hope to see it further refined.