This idea might be impossible because of language gaps im not sure but I was thinking there could be some sort of guild council that the leaders of each guild could be in. Inside the council there could be a few staff as well to help plan some server wide events that would bring players closer together and make the whole guild community closer. It seems the only thing special guilds have is the fact that they can compete for top 10 spots but never any official guild events. (This idea might be crazy)