I also liked the original tadpole system more, improve by using it, makes total sense. They still could have combined that with the new skill tree.
If in the new system it's somehow explained by "consuming the power" of the tadpoles rather than just shoving more parasites into your brain... maybe i can accept it.
Anyway, on my first playthrough i'll go completely anti-tadpole, never (if i can) use the powers and destroy all i come across. Might be tough but also a good challenge.