Right, the problem is just that "unread counts" aren't that nice of a feature for RSS feeds, because not all posts are created equal. (Hell, it's not even that nice of a feature on email, unless you do a lot of filtering.)

I like the volume slider ideal; I that you could leverage social media outlets as a scoring system. (I'd include HN in that - the more points, the higher the score.) That could give you a nice way to "bump up" the things past some "volume" you haven't seen in priority.

I don't like the idea of "just don't subscribe"; why can't the tool figure this out for me?

Edit: "aren't nice" -> "aren't that nice". I do think counts are useful, just far, far from perfect. What I find myself dong is finding a feed with unread items, skimming, then marking all as read. (Well, when I use Reader, sigh.)