Me and the community discussed this recently based on the recent reviews.
Full fast travel isn’t the way. At most, I would personally allow to teleport to the furthest whisper of any area once you reach it, but all whispers is too much.
Also, I would add some cooldown between teleports that are not between Sacrament and Last Whisper or viceversa, so it’s not abused.
This is my personal take.
