I have also found the traditional user story template quite lacking. Here's a couple of relevant articles that I've written on them. You might find the second one in particular quite interesting:

https://uxdesign.cc/moving-beyond-user-story-templates-79a421c6445c

https://uxdesign.cc/a-user-story-is-not-a-template-its-a-process-7492dcf106cd