At this point the game just needs to categorize players better than it does so the phasing and instancing design can be put to a lot better use than it is now.
Major flagging points should be:
- Flight
- PvP
- World Events
- Mythic World
These would be toggles the user selects when they are making a character, effectively consenting to one or more of the above to be placed in a world with like-minded people.