Outliners are great and underrated tools. But after a detailed analysis of Org Mode (and some other tools) I implemented https://github.com/rochus-keller/CrossLine which I'm using every day since ten years.
You should write some words about why your tool is better than org if you mention it here.
Org gained new features too in the last ten years. E.g. for crosslinking there is org roam: https://github.com/org-roam/org-roam