I've always been a fan of untouchables in the setting and I'm really pleased to see that they're being treated almost as a new type of psyker in the new edition of the rules. However there are a couple of things that are bothering me about the implementation.
For a start, while Soulless specifies that the character no longer has a presence in the warp there are no mechanical effects to reflect this. It used to be that Untouchables couldn't be detected by powers like detect life or psyniscience, but now they seem to have no bonus towards being undetectable by psychic means. Similarly it used to be that force weapons didn't gain bonus damage against them because they had no soul to destroy, but there is nothing relating to this here.
2) It used to be that untouchables were immune to the direct effects of psychic attacks but could be effected indirectly (a telekinetically thrown car could still crush them for example). I'm not suggesting total immunity is the way to go in the new system, but it would be nice if they gained (or had the ability to gain) some form of resistance against powers these kind of powers without having to be stood next to the psyker making the attack.
3) I feel like Untouchables should gain (or again, be able to gain) a bonus to 'deny the witch' as an evade action. After all their existence is meant to be anathema to pyskers, literally lacking the part of their existence that psychic powers manipulate.
I'm not saying what is there isn't interesting. But at the moment it seems like they get treated like any other human if the psyker trying to effect them is stood out of their 'bubble' which is fine for the effects of some powers, but it seems to be a bit lacking as a way of representing the established fluff for them.
What do you guys think?