I don't think there is a bunker strong enough to endure the fanbase exploding over this.
'thanks for your patience'.
Finally they admitted having a release delay. This is a good step towards having a fair approach towards the fan base regarding timing.
However, I really expected having the final thing, not another UA again.
It could be true. It would also be interesting to know if this Xan2 thing is actually one of the planned book of 2019 or not.Those not interested in Eberron will probably have to wait for another Xanathar's-like book to get hold of the final thing.