Couldn't scaled sort or new sort in the all tab already do that? There's also the community browser. You can sort communities by different criteria there.
Community browser is a sure fire way to get a lot of dead comms with like 1 post.
Are you in the All tab? You can also sort by most comments (that doesn't take recent activity into account, but for that there are other sorts). If you are only finding dead communities, it probably means you have reached the end of lemmy and that there is nothing more to see.
Voyager has a setting for "No subscribed in All/Local" that does this. It's better on than off, obviously, but it doesn't turn All or Local into some kind of goldmine.
I get the sense that, unless you're willing to do it yourself, feature requests for Lemmy don't have much chance of being realised.
Alright good to know that it's a thing already.
Lemmy
Everything about Lemmy; bugs, gripes, praises, and advocacy.
For discussion about the lemmy.ml instance, go to !meta@lemmy.ml.