I’ll start. Did you know you can run a headless version of JD2 on a raspberry pi? It’s not the greatest thing in the world, but sometimes its nice to throw a bunch of links in there and go to sleep.
As long as you have your quality profiles set up correctly they very rarely grab a bad release, I’ve maybe had to throw out 3 movies and one season of anime it grabbed during the past year I’ve been using a full *arr setup combined with jellyfin and jellyseerr.
If you set the series to “Anime” it should use both episode number and absolute numbering when searching for anime. It’s certainly not perfect but it gets the job done most of the time.