May 17
Able to choose how Note links are rendered
Whether I would like it to be rendered as raw markdown, e.g. [[Notelink]], like it is now, or maybe have it look like an actual link instead.
If this is implemented you could also differentiate between Note links where the page has been created, and Note links where only the link has been made, but the page has not been created yet. A good example of this can be found in Obsidian.
Pending
Your main suggestion is already possible using NP's Theme system. I think there was even an example of this very suggestion in the #Themes channel on the discord server. (Though I don't think the differentiation is yet possible through Themes.)