[/quote]You're mistaking storytelling with character motivation and choice. I doubt any good character of mine will be tempted but I would certainly like the choice if I decide to explore a character with different motivations. You're using using EA logic, but we have actually seen a spoiler character mentioning that they won't let us become an illithid and again depending how you want to choose to roleplay your character, the choice should be there if the narrative supports the choice too.
Most sensible people would avoid it like the plague, but we all know dumbasses who think they can gain the system surely? Faerun's dumbest criminals maybe? I mean Gale's pretty smart and he thinks he can outwit a devil, which seems like a recipe for disaster, but also seems very in character for Gale[/quote]
Character motivation and choice are a part of storytelling. And while a character's choices conflicting with their motivations can make for good storytelling, I don't see this as one of those cases. To me, it just doesn't make any sense that a character would be spending their days and nights searching for a "cure" for the tadpole while at the same time sticking more in their head. Why not just say the hell with it and go around searching for more tadpoles, gaining more power, and not even bothering with how to remove them because, logic would dictate, by removing them you would lose said powers.
Now look, I'm not sure how all of this will be implemented, maybe it will be all good, but from what I can see now this particular premise looks ridiculous and nonsensical. I think it could've been executed much better to the same end.