Personally I find the /etc/init.d scripts to be crufty & in the way, & would rather not have them in my system.
But I acknowledge there being other folks who for whatever reason prefer SysV style. And the maintainer's silent treatment is pretty harsh.
I would like to give these other users a path forward, but at the same time, I don't want this file in /etc/init.d/ . It's in the way of a better functioning systemd system, I believe; not an area i'm well versed in but I think the init-script helpers expect only an /etc/init.d/ or /etc/systemd/system file, not both, and the /etc/init.d/ script is much less powerful & usable.