Request for two additional buttons next to Clear Subscription - Show hidden thumbs - Unsubscribe, which would be "Mute Subscription" and "Mark all as seen".
It'd be practical especially for some users who are subbed to a lot of tags, in the middle of managing their subs/favs, favoring some tags to others depending on mood or time, etc. While marking as seen wallpapers from a subscription's notices, by itself, would be of great use for those monitoring specific tags (for inaccuracies for instance), while also skimming through new uploads afterwards. I can see it being a considerable time saver for some of us.