I'd welcome such a tool, but it makes me nervous that it hasn't had any activity at all in three months. Was this just a single-shot effort, and move on?
It's fine to mature projects if they're good enough according to author's point of view. No point of fixing something that's not broken. No point of adding features that no one needs.
That goes without saying. But there are a few bug reports and issues that have gone without a response for months. It seems abandoned, rather than finished to perfection. Not to mention that systemd is a moving target, with new features released quite often.
https://github.com/rgwood/systemctl-tui