Indeed, all equipment (except Potion of Wolves Blood) that has had a stamina restoring effect has had it changed to Heat Sight or Ultravision because of the new melee combat abilities. Since the new abilities, along with disciplines, now use endurance (which was your stamina bar), the invigor effect would be a form of nearly instant mana regeneration for melees. That would be a little too fast. I am not sure why vision effects were chosen as the replacement, it seems kind of a crappy tradeoff to me.