Why doesn't Devuan edit sysvinit to use systemd's unit files instead
of scripts? That would bypass the entire problem. Those who want to
stick to scripts can always direct sysvinit to use scripts instead. An
edit/patch would aim to make sysvinit recognise unit files and run
scripts when instructed to.

Before I get a barrage of smart-ass replies like 'You do not
understand', yes, I know, it is EASIER SAID than DONE. Everything
technical is like that, unfortunately.