That's a great idea, specially for that skins that aim to be at the Completed Skins subforum and are revised by deadbeat, making icon system look alike the pending beatmap icon system. I think this can be better organised in the future as there's people interested in this, but that's a remote suggestion.
Also, it can be helpful for those who are looking for a good skin outside the boundaries of the Completed Skins Subforum, which it has few skins yet. I usually visit this subforum looking for what kind of skins people do or watching what I like, and sometimes, specially for new skins, the content inside the topic is an absolute lottery. Icons will help a lot on that.