As far as the "nerf" to the hexwraiths, that is hard to swallow in my opinion. Just because they forgot to answer it back when they answered this question:
Q: For units such as Vargheists and Blood Knights (which are Vampiric), does a successful casting of Invocation of Nehek enable them to regain 1 Wound per model, or 1 Wound in total? (p60) A: A Vampiric unit can never regain more than 1 Wound from Invocation of Nehek.
Doesn't mean that you should of been playing them as if you could heal more than 1 wound total on the hexwraiths. They lumped ethereal and vampires in with the restriction on the spell. They just forgot to add ethereal to the FAQ. And I doubt fantasy will get another FAQ/Errata revision. I think you should of been playing them "nerfed" since that update personally.