I was thinking that scheme tags could be an interesting feature to find schemes. Not sure if scheme tags or more scheme categories, but I like the 3 simple existing ones: Race, Battle or Other. Right now to find schemes you usually need to use the search very well with quotes or try finding them among various other schemes without quotes. Tags such as: "artillery", "Weapon-specific", "Conventional gameplay", "Roping", "Pontuation", could be interesting. Or maybe "Dynamic/Physical/Adrenaline", "Tactical/Strategic" and "Artillery/Accuracy" like I think Komito used to say a way he likes to classify schemes. I also suggested similar categories on WKB's Schemes Talk Page.
It would be nice to categorize a scheme that was specially designed only for a specific map, this way those schemes could be hidden when you want to search a specific scheme.
EDIT: also, a category for "joke schemes" could be interesting.