Just adding a +1 to this. I’ve only been using Agenda for a few weeks and I noticed the same thing almost immediately. I have projects inside subcategories inside categories, and even without an absurd amount of projects (~20-25 total inside 3 main categories and 8 subcategories), I feel like I have to do quite a lot of scrolling to get through the list.
The way that the Custom Line Spacing setting is implemented inside individual notes is really well-done, and it would be such an awesome option to have the same customization on the projects side panel. As the OP said, I realize that spacing between Categories and Subcategories is there to quickly communicate visually the difference in groups, but within a given Category/Subcategory, the spacing between individual projects seems really excessive, almost like 1.5 Line Spacing in a Word document, and having it closer to 1.0 would be fantastic for fitting more projects on the screen at one time without so much scrolling.
In a perfect world, one slider could control the Project-to-Project line spacing and one slider could control the Category-to-Category (and Subcategory-to-Subcategory) line spacing?