Dead servers are a problem in general. Nobody likes to walk around in a ghost town. However, my biggest issue with Dead servers is the lack of raiding guilds.
Personally I would not pay 200+ dollars to move my characters from one server to another. Therefore, I would quit the game if there were no more raiding guilds on my server. I think it's a sad way to quit the game, but it is either pay a lot of money or quit.
I'm interested in hearing from you either:
1) Have you already moved multiple characters from a dead servers in order to join a raiding guild?
or
2) Would you be willing to pay a lot of money to move your characters from a dead server to join a raiding guild?
Of course I think Blizzard should find a solution to "fix" dead servers.