I don’t think they can afford to do this. They need it out late summer at the latest. I agree with Malachey, alpha starting at the end of February, then beta starting early May and release in late August.
With prolly a bunch of stuff pushed back to the 9.0.5 or 9.1 patch. Stuff like Torghast, I wouldn’t be surprised if it gets shunted as far back as 9.1. It looks like a huge undertaking so I’m not expecting it right away or to even be everything they promise.