Would be great to have the progress bar not just calculate on some field completed, but also show as a sort of segmented progress bar, where you can see the percentage of items in another status category. This would allow to have in one view a clear indication of how an epic has progressed based upon the features underneath it, and how many of them are "almost"done.
Something comparable to what Jira is providing in https://support.atlassian.com/jira-software-cloud/docs/see-the-progress-of-an-epic-on-the-roadmap/
The epic’s progress bar is divided into three segments:
The green segment represents issues in a Done status category
The blue segment represents issues in an In progress status category
The grey segment represents issues in a To do status category