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...
About long rest: I wish, they would make companion conversations available anywhere not just during long rests. I have managed to get Gales Weave scene exactly once in all my playthroughs. Even if I'm longeesting like mad, there is always someone else more important before the Weave scene.