I absolutely love how easy it is to deploy docker containers....UnRaid was kinda my gateway into the whole docker system. I've always been a linux guy, but before dockers were a dark area for me.
One thing I would absolutely love to be implemented into UnRaid is "High-Availability" both for dockers and the filesystem. I host websites and data storage (NGINX wordpress sites and Nextcloud) for friends and family. I run 4 UnRaid servers right now...each have their intended purposes, but it would be nice to set them up in cluster nodes, that way if I need to shut one down for maintenance or something....it doesn't bring everything down with it.