- not friendly enough for my script-based deploys -- in particular the story around letsencrypt certbot having to edit my nginx config to inject the cert paths and some other things. I want my program to be a deb package that just puts HTTPS proxy config as a config file somewhere and the rest to "just work"

- error reporting is quite unclear in my taste, and I'd love to see a "trace" mode where you can debug your misconfiguration

- integrating with kibana/grafana requires NGINX PLUS and/or some hacks

- logging not in systemd