I would love the option to set certain settings from the server side which would pertain to all users and devises accessing the server. For example, being able to update the pinned libraries (and order) once and have it propagated to all devices and users of the server would be fantastic.
This has been discussed on Reddit here: https://www.reddit.com/r/PleX/comments/u65oxz/feature_request_client_settings_syncing/
This should be an optional feature, but would be extremely helpful especially when trying to setup Plex with family members who may be older/have difficulty with the UI.
Similarly, being able to tell Plex to default to the “Library view” rather than recommended would save the vast majority of my tech support calls from my confused parents. While there is a way to “Remember selected tab,” as has been discussed this does not always work and should be able to be set from the server side in certain situations.
I’m sure there are other settings that would be helpful to be synced from the server side, but this is just some that come to mind. Basically, it would be great if Plex had a “grandparent mode” for better customizing/managing the user experience.