For companies that use agile methodologies across the business, it would be helpful to have better support of the Epic and story issue type in the Jira Work Management project templates. Plus, advanced roadmaps expects it. You can add these issue types, but the fields required for the Epic aren't supported in the form. And the hierarchy doesn't display in the list or timeline. The hierarchy displays nicely in Advanced roadmap if you have an epic set up, but if you don't, and you just have a task with subtasks, it categorizes the work under "issues with no parent." So it's sub-optimal no matter which way you do it.
|Support Epics > Stories > Subtasks Hierarchy in list View
|Support Epics, Stories and Subtasks in Board view
|Support Epic related fields in Forms