Is this real? That's garbage. Release all the content at once. If people can do it, let them do it. Don't force them to wait while everyone else gets gear that they need to be able to complete content.
I'll be extremely upset if only 1 raid is released on release. We were told many times there would be 13 Raid bosses and 2 outdoor bosses AVAILABLE on release, yet this isn't at all the case as of right now.