Maybe Dwilight was a mistake. I'm not above admitting and fixing mistakes.
So long as your "fix" is not to close Dwilight.
If you look at Vellos's analyses in the Retention thread, Dwilight appears to be the continent with the best retention numbers, and has actually been increasing its player count, while the other continents are generally trending down.
I think that the one of the very worst things you could do for the game at this point would be to close Dwilight.