I haven't really got a clue what the status is on those higher raid instances. But if they can predict an ETA when those will be done and it fits within a good time before people will get ready, I'd say: "Make it an epic release on the 11th feb"

But of course, if there's still too much work on those. That epic moment will not last for long. People can wait on a closed server, but they can't wait in an open server. That will lead to losing players.