I’m also curious about how it works with a mix of subscribed communities. When I sort my subscribed comments, Hot seems similar (identical?) to New. Active does give me interesting stuff, but hides things I’d be interested in from smaller communities.
I’d like a mix that gives me those more popular posts I’m interested in, but also gives me the less active posts from smaller communities.
You’d need some way of calculating a scaled score of each post in each separate community, then providing a method of sorting all posts using that scaled score. That is, some way to realize a post in a 100 member community with 25 upvotes and 200 comments may be more relevant in a subscriber list compared to a post with 200 upvotes and 100 comments in a community of 10,000.
Of course, I’m not sure I’d want the same scoring mechanism used in all as opposed to subscribed. I want to see the niche but interesting stuff in my subscribed communities. I’m not sure I want that when looking at all, or at least not to the same extent.