The realms with the highest player densities on Dwilight are Westgard, Madina, and D'Hara, which are exactly the realms which are getting swarmed with Monsters because "player density is too low". The human realms are giving ground very slowly precisely because they are the realms who can least afford to give up ground.
This is not the right strategy to increase player density. In fact this may be the exact opposite of the right strategy. D'Haran nobles are not going to join other realms if they lose their estates. They are either going to emigrate or just quit the game. If you want to encourage the players to bunch up, have the Monsters attack the realms with low player density. They actually have ground to give.
And I know that the GMs did not intend it as such, but putting the refugee realm on western Dwilight just seems spiteful in hindsight. "We are sinking your island. What's that? You want to keep playing? You can go play meat-shields for some strangers on this other island."
