Edit: Maybe a less general approach to this would be to offer a weighting for each community, and lemmy would skip some percentage of posts to that sub in your feed. This isn’t how most commercial sites would do this, but it’s simple and maybe close to what you want. It also doesn’t exist today though.

That is a good idea, others have suggested this as well. Like maybe add weight to certain communities, but be only profile wise, so you can tweak your own profile, which won’t intefre with other’s feeds.

Also, a warn prompt when blocking communities would be nice as well. I’ve blocked a few communities by mistake, unblocked them afterwards, but had to log in the web UI to unblock them, there is no unblock community/user option in Jerboa.