I feel like the tadpole in gales skull is a rather dire situation. I know it's up to you but you tamper with the tadpole in your still living bodies several times on the way to baldurs gate. From letting volo stick an ice pick in your eye, to the githyanki doctor, to ethel attempting to yank it out with magic, to the goblin shaman drugging you and trying to kill you, and the shaman in the druid camp offering a solution in the form of poison (I guess you could argue this doesn't count but you went to her with the expectation she'd mess with it), to auluem offering to send you on a drug trip to play with your tadpole. Your party is in no way hesitant to let people mess with your tadpole in the hopes of having it removed and I can't think of any mention of post death ceremorphisis. I know withers is kinda a game mechanic to let you bring back your party but he is there according to the lore, and I doubt his magic is just rivivfy. So it seems like you should realistically be able to...