i haven't read all of the lists but here is mine
1. If you have a game with so much gathering and crafting content you have to make a in-game market for the players so they can sell and buy items without the use of a forum, so a commerce center would be great.
2. the camera, it could go a little further, more angle, more horizontal, don't really know if it is hard, u could give better computers the option for better display.
3. there is a death zone in gathering, mining is the same from 1 to 10 or dunno what lvl... so there are alot of ideas, higher lvl faster gathering, or more units per gather, or getting weird stuff i don't know, its an incomplete idea i know.
4. if the world chat is the comerce channel, then u could just right click on the name of the person speaking of ur interest for a pm, some ppl make it really hard with their names to get a pm.
5. guilds, guildwars.
as a plus, it would change entirely the game, but u guys alrdy have the perfect scenario developed, there are 5 big kingdoms, it wouldnt hurt if players can choose their loyalty at an specific lvl.
Example: at lvl 15 u can decide to go and work for tristan army.