SP, I really don't get what you're doing here. Just let the maps be in the DB, doesn't hurt anyone. This is not a best-of list, every user has the right to post his maps. If you don't like it, just give a bad rating, post what you dislike, and leave the thread.
I see your concerns for the quality of the DB, especially for non-regular users who just search a couple good maps for some games, they should not have to analyse the maps first, they should just be able to pick blindly. But on the other hand, it is very frustrating when your map gets deleted.
I already have an idea how to help seperating the best maps from the rest. I hope I can motivate myself to program it -_-
I did not add another "maptype", there are "recommended maps" now. I started with putting all motw in this list, you can add more in the admin menu. Of course the question is who decides which map is "good", and how strict we should be (2 maps in an average week or more like 2/3 of the maps?), the "keeper of quality #1" Starparty will have big influence in setting the guidelines.
So how would you handle that? Only the very best maps or every map that looks quite balanced and well playable?
However, recommended maps should also have a more obvious search route.
I dont think there is too many people who actually changes criterias in the search menu to find anything in particular. I think they just use the "all maps" link, or at most the other ones in the leftisde menu.