They’ve been very clear that they would not allow you to transfer back, so now you’re kinda screwed in that regard I’m afraid. Just level up there, many people don’t want to deal with the queues anymore, and since it’s a fresh server quite a few people should roll there as well.
Don’t expect nearly the amount of pop you’d get on a server like firemaw or shazzrah, it’s not gonna happen, but it should still be ok