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.
"We are all stories in the end. Just make it a good one."