Also, once he loses the tadpole, there's the small inconvenience of once more being bound to your coffin/crypt/grave site etc. I assume Cazador transferred piles of dirt to the manor somewhere and that's where they all rested. What do you do as an adventurer? Lug it around with you? Did they just ignore that with the vamp companion in the Enhanced Edition?
Uh, what are all those spawn in the Underdark going to do... well, maybe this is a Larian homebrew thing. Like the lack of claws and spider climbing.