I like the idea of being able to start charging Tame before the animal approaches, and also that you have to be next to the creature when casting. I copped two big hits from a Hoarder Spider leaving me at 1 or 2 HP, but I successfully tamed. I think you should have to have some risk for the Sov to tame units, as successfully taming Hoarder Spiders or Umberdroths can set you up for the entire map.
