Currently the plan for server costs – when Anet are ready to introduce them – is a simple 3-tier concept based on server population; low = a little, medium = a bit more, high = a lot.
I think this can be improved with a view to addressing the problem of WvW queues and one-sided matches:
$transfer_cost = abs($existing_plan + (($wvw_ranking – 1000) * 2))
This further increases the transfer cost to servers who are both high pop and high rank, while reducing the cost down to potentially nothing for servers who are struggling on both counts, providing a more direct incentive for the WvW-inclined to take up the challenge of playing for a lesser server.
Thoughts?