Originally Posted by saeran
I think as far as motivation goes, the 'get rid of the parasite' works. Survival as motivation is more universal than the 'give into using the evil powers' temptation angle. The issue is that by the time act three rolls in, everyone seems to have forgotten about it.
Act 3? The tadpole gets redeclared as a benign powerup gimmick in the middle of act 1.
The very last point where the tadpole is seen as a problem by the story is the optional creche.