[actf]

In my experience the problem is that when written as you describe them - user stories represent features and are rarely, if ever, granular enough that they represent a "thin vertical slice" of functionality - as scrum likes to call it. I've always felt this was something scrum did a poor job of addressing.

I have found that using user story format for epics or for features, and then further breaking those down into tasks seems to work quite well. Although as far as I'm aware there is no concept of a "task" in scrum. Task seems to be a Jira concept.