Also, I have been thinking based on some of the conversation on the Sethrak Discord, is that Blizzard did not have Sethrak outright planned for BfA. They got some of the basics down.
I also suspect Blizzard wasn’t imagining the level of popularity the Sethrak have received.
We gotta remember that they have stuff planned out for at least 1 or 2 expansions ahead of the current one we are on.