There is something I don't understand, I'm a beehaw member and I subscribed to federated communities, including some hosted on lemmy.world instance. While you say you are defederating immediately, I still have access to those communities from beehaw. Is it an old version (like a cache) before you disconnected the things or is it not yet effective or, as a newbie lemmy user is there something I did not understood ?
Do you know if there is an issue on lemmy github about this feature you talk about (more flexible federation options) ? So we can follow or maybe contribute