So shutting down EC is not an option. That sucks.
I think the best option we have is EC/Dwi/SI/Col. And open up Dwi probably and allow people on other continents to move to Dwi without losing any gold or H/P since it is more of a forced migration but of course they will have to choose among their characters which one they wish to play on Dwi.
Logically Dwilight is the largest map, thus the effect of lowered numbers will be more pronounced on it rather then BT.