It looks pretty cool, has some nice rules and it even gets new psychic powers. (Force a Ld test, give fleet to a wraith unit or give wraiths an extra 6+ save for a turn)
Takes up an HQ slot but you have to take another HQ option with it. You can even toss a D-Cannon on it's shoulder.
Not only does it act as a 12" spiritseer, but anything shot by it and all wraithguard/lords within 12" have their cover saves worsened by 1. Wow.
I think the most amazing thing about this Forge World release though, is it's the same price as a normal Wraithlord. Bazinga!