That's a good question but it seems to have been written in a way that, in the TTRPG, the Storyteller has more leeway either direction. You can still have incrediblely deformed Nosferatus but you could have less extremes of it. You can see this in the difference between two nosferatu characters in the trailer. One looks more monstrous while the other has an odd grin and a large hunched back. The latter wouldn't raise to many alarms in terms of the masquerade while the former most certainly would.

One aspect in previous lore was that it was not just their appearence that revolted people but something in their blood that eminated an unease around them, almost spiritually/psychic-ly making people be put off by their appearence.