What can be (realisticly) improved for a better and easier experience
This is possible using Trakt. Add a movie or series to your watchlist, sonarr & Radarr sync from this list and add to jellyfin.
There’s also a plugin in jellyfin itself for Trakt that can report back to say when you’ve watched it I believe.
Interesting, looking into it, it can automatically send a request to Sonarr and Radarr to download certain content, if I don’t have it on a streaming service? How does this compare to Jellyseerr?