line 12 of startserver.sh does not use the forced java path from server-setup-config.yaml
(causing it to fail in my case, requiring a manual edit)

Yes, because forced java path should be only for your launched server, not for serverstarter. Serverstarter should launch with any java now, at least since latest release https://github.com/Yoosk/ServerStarter/releases.

ah, well at the time i downloaded the server release it did not work for java 14