My personal opinion is that episode discussions should be in the same place (preferably !episode_discussion though I understand shinobu is down right now), so they can be discovered by non-core fan of series.

Perhaps if there is some way to add a function to shinobu to include a custom blob for each show it can link to a local fan community of a show in its posts if one exists. Failing that, perhaps a thread here each season linking the season’s show to local communities would be good for discovery.