It would be amazing if Sonarr could interact with Plex to see which episodes you currently have in your Plex library for Series tracking.
This would allow people like me, who use private trackers and want to continually seed, to be able to have the ease of use of Completed Download Handling without having to worry about Sonarr “importing” and thus creating a second copy of the files. If Plex could be used to maintain series status we wouldn’t have to worry about folder hierarchy and all that jazz, so there’d be no need for redundant files taking up drive space.