The current WvW has turned into a system where players migrate to an instance where they dominate, thus owning most of that world. Then the fighting amounts to dashing here/there to recapture places the smaller groups thake and run.
What if:
1. Have only 1 instance of the 3 areas filled by the first players from all servers to a ballanced level that can be supported by that instance (#1).
2. The next players over the limit go into another instance (#2), rotating the starting portal and so on.
3. Players will want to join with friends/guildees in currently filled instances should be allowed to play an available instance and/or que for a specific instance
By having only one instance (world) available that will be ballanced will make for grander battles and the best tatics may be the winner of the week.