In case of the use or non-use of tadpole powers, I think, there will be a payoff for not using them later. And let's be honest, the whole dreamlover sequence is creepy as hell...
I believe i have readed somewhere around here some datamined consequence of both decisions ... if you are curious.
I still dont understand why cant we change Race for our hirelings. Lets us play Githyanki as racist as they trully are!