I will be very annoyed if the tadpole can't be promptly removed because Larian decided for me that I need fun powers, and that's all the tadpole is without any drawbacks.
With tadpoles being source/bhaalspawn essence I am willing to bet that we are stuck with them for the entire game. At the end of act1 we will learn what the tadpoles are really for, like we learned there is more to us being sorcce users in D:OS2. The rest of the game will follow from that.
As to OP. I used tadpol and gained access to its powers once. Can't remember quite what it was.
