It seems assumptions on how many people would go back to 1.0 servers was wrong. And this is only the Early Access. I think a plan need to be made to allow these servers to split up a bit. maybe create a second server for each 1.0 server. Allow people from each of those worlds to migrate to their second server. Allowing for the ability to split each server but not letting people just freely move around.
the ability to move entire free companies and not lose progress would be a big plus as well.
edit: queuing server issue
for the queuing server, perhaps you should create groups of worlds that are on the same queuing server so that the system is not overloaded.