I do think the game has an annoying fascination of punishing the player for trying to remove the tadpoles. Also see Ethel ... not so much Volo, but there are simpler ways to get See Invisibility.
On the other hand, I don't see any of those debuffs mattering much in a playthrough, and I like to see Lae'zel punished for being an absolute idiot throughout much of that quest. "I am becoming pure!" indeed.
