For tribe options an allied setting would be great. On my server believe it or not is more civilized and less barbarian then others I've been on. We have a number of allies. A simple option or code to change the color of there name to indicate they are allys from a certain distance would be great.
For trade option. Add anot her option on the action wheel (when holding "Y" on a player) to trade. This could enable other players to set up shops and create there own economy. Further evolving the game.