1)guild chat room
2) global coalition chat room for tht world only.
3)A chaos chatroom (debatable topic)
4)warlord/crown chat room
and even though ull are implementing a guild chat, which is brilliant for within the guild discussions, perhaps creating a social networking app or tying up with one of the better networking apps to provide an exclusive valor chat room which supports groups, uploading/ sending pics and allotting hierarchies in the chat rooms as well so as to keep the feeling of the game intact. allowing one person (becomes the administrator) to create a main chat group under the guild name, under that, the sub-admins or generals or whatever u want to call them can create sub groups whenever necessary. and access to these chat groups is only gained thru invite and they are not visible to anyone who isnt invited. except maybe the developers. and on one of the earlier threads i read about the map and perhaps creating a new app for the maps alone. perhaps a database of maps cud be setup and the chatroom could include a map tab which will display a map of one world that is set by the guild admin and this can be retrieved from the database. also, perhaps allowing for backgrounds and prof pics in the chatroom would be nice. jus make it more friendly. allowing the guild admin to change the specifics of the chat rooms thru customized graffics or whatever else mite be goo as well. that is the section on chat. i would suggest checking out kakao for the way its setup, but u will need something tht can take on a larger number, and u can promote this thru the game via aurora
...who wudnt want to click on the link lol. plus the chat room can be used to send and recieve mails as well, so ull sort of make it mandatory and u can knock off the ingame mail. i think if u allow common id's u can allow for syncing contacts from valor to "valor Chat" 
it shud sync guild memebers. it may make things a lil more complicated but distributes the strain put o the game app. also, maybe this will help curb chaos in one way. cripple the ability to attack guild members and allies. once sumone becomes a guild member or an ally, the "attack" button should be obsolete. reduce the attack limit to avoid lagg.
reducing the waiting time for sending resources might me a good idea. waiting 2 weeks in each world is a bit much. but i guess it keeps players from leaving too soon to an extent.but still, maybe decreasing it to one week would really make a diff.
and finally, maybe providing opportunities to win coins in the game or thru the proposed messaging app. it mite boost ratings.