I believe they are not decided yet on how to handle Long Rest/Short Rest and fast travel exactly yet. I am sure they will err on a side of player agency and maybe for Normal difficulty we'd get a lightly restricted rest system and then they will let players have the agency to exploit it or not on their conscience.
I personally would like rest to be more restrictive, as limited resources is part of where the fun is, so I hope for tactician or whatever higher difficulty they conjure - they will put some sort of more restrictive limiter one way or another, whether if it's requiring heavy supplies you can't steal or rest only in the designated safe zones and fast travel only at the circles.
