Hello Billiam,
I purchased Deepdwn today and writing with it is really a lot of fun. The clear layout and structure is so centralized and tidy. It's an incredible enhancement to my daily notes and the design document that I'm in the process of converting to Markdown. You really created a very cool piece of software there! Thumbs up!
I know you must have a lot of work to do, but how do you like the idea to define variables in YAML besides Title, Category, Tags and Dir to apply them in the text afterwards. Below I have attached an image that I spontaneously found on the subject.
It would be extremely ingenious and could almost automate numerous daily tasks for me. Of course, this could also be solved with search and replace. But variables would be more comfortable.
If you would then also add functions of a simple spreadsheet, I wouldn't even need Excel anymore *haha*.
Well, these are just suggestions and if it doesn't fit your vision of this software it doesn't matter.
Have a nice day and stay healthy :)