Wishlist items and bugs in no particular order below. I know some have been noted before, but adding my votes. Although I have the iOS version as well, the following is all based on the macOS version.
1 - Indicator to show that a category has items in it after clicking Hide. The lack of indicator violates the “If the user can’t see it, it’s not there” principle. The user must mouse over a category that has been hidden for Show to appear. It seems trivial, but it’s a basic UX issue.
2 - As a follow on to 1, an indicator to tell you a category may be collapsed.
3 - Subprojects or some other means of multi-level hierarchy. Lack of this is close to a dealbreaker for me.
4 - Indicator to let you know that you can collapse a note. Stumbled upon it by an accidental double click. Another basic UX issue. There is a “…” indicator to tell the user is can be expanded.
5 - Unable to create a tag from “1:1”. Agenda will turn only the “1” into a tag.
6 - Unable to create a tag from an emoji. 2Do allows for this and I use the emoji as a tag in it, which populates a smartlist.
7 - Support for tables in notes.
8 - Support for inline images in notes.
9 - When right clicking on a saved search, it gives you the option to delete Overview. It should use the name of the saved search you are attemping to delete.
Nice app. Looking forward to seeing it mature.