That's a problem of lumping together so many things. Maybe Wordpress is significantly different to separate out, but in my experience blogs and personal sites can do threaded comments, and I wasn't aware of the "subscriptions" page, but it only applies to Wordpress, you can't do it with other sites, so I think I'll leave it as it stands. It's certainly not set up with that as an aim, it's all about the single broadcaster with multiple subscribers.