I would love to see the ability to sync plex watch history between servers. Currently I have a Plex Cloud server and a local Plex Server but they both have completely different watch history for the same user. The watch history for offline could also use this mechanism to sync back to the online servers when they become available.
This could happen by Plex.tv storing the watch history, or Plex.tv handling the syncing of metadata for a user between all the servers that a particular user belongs too. This could also help the issue if your server owner has to reinstall or do an entire reindex from scratch erasing the plex metadata folder.
