I think there should be a new chat channel (i.e. say, map, team, etc) that is specific to WvW. This chat channel would encompass all 4 WvW maps so that you can chat inbetween them. Obviously the problem might be that the chat channel would get spammed by people who shouldn’t be using that channel. So I think that only commanders should be able to talk in the channel, and everyone who has the channel enabled can see it. This could help promote better organization between the 4 maps on your server. For instance let’s say you’re outmanned on EB and a zerg is sieging your Stonemist Castle. You could easily call out for other people to join EB and help defend it.