Personally I think moving away from the hodgepodge of scripts, giving a consistent interface for people to use, extend, etc, is kinda necessary for the average user to have a decent system. It can often be complex to make things simple.

I'm also not sure how systemd could override a config file, because systemd does not write the unit files on a system. Wouldn't that be on the maintainer, distro, or other methods of getting the unit file?