Yes I know, Wow had/have this problems too.
But actually only preorder people are playing the game (this means Bioware kows the exact number of players for a quite while) and we have to wait 2 hours bevore we can play.
In my opinion it was a failure to invite the people by waves and to add server by server.
Because now you have extremely high populated servers and a lot of new players will not choose the servers because of the population. They will join their already playing friend
So Bioware should alow servertransfers to solve this problem.
And the next big issue is, that the server does not remember your IP. This means gamecrashes or disconnects will immediately place you in the login queue.
The rest of the game is amazing!!!!