When fast traveling, it seems you can just jump from the top to the bottom and still survive, without having to fall like an assassin.

I just saw this happen while watching a streamer play this game:

I'm not sure if this helps in any way or is faster than the assassin's fall, though it might be good to know it can be done while jumping from any other higher up place.

It seems to be a fall-cancel with a weapon equipped to my understanding.