I agree. The VQ needs to be more expensive, or something. Compare her to the Bog Mummy and Master Lich (or whichever lich is more expensive..) and it's pretty obvious that she just totally overpowers them. Since most of her abilities are pretty thematic, I would rather see more expensive paths and an increased cost than an actual nerf of the unit.
Maybe she could be restricted to only blood nations, such as Abysia and Mictlan - but not Ermor, since they aren't exactly blood focused
But one way or the other, a Pretender with so many obvious advantages (from immortality, regen, etherealness, stealth, decent path cost, immortal vampire groupies, etc) should also be the most expensive.