So I looked through the beta rules. There were a couple of things I liked and a couple of things I didn't like.
I can see that they tried to streamline the base system and make it much easier. Except they didn't. It got a very kind of White Wolf treatment, in that it tries to present itself as an easy, managable and intuitive system, while it really, really isn't.
I didn't really like what they did whith psykers. On the one hand, it's unwise to start the game out as a psyker, because that essentialy just gives you a pack worth 300 xp, which you could supposedly buy with any other role and the GM is even encouraged to let you do it. On the other hand- not being a psyker is just dumb.
They turned cybernetics into straight up upgrades to your body, which seems very much out of theme for a Warhammer game. Not that I don't like a touch of transhumanist dream in my games, but this emphasis on playing cyber-psyker-assasins is a little silly.
But worst of all, it seems that playing a sniper is still unvayable. I mean, you can grab a sniper rifle and shoot, but the way the injury system is made it's nearly impossible to die in one hit and when it happens, it doesn't happen due to big damage you can deal, but blind luck, because of the way the crit table is done. With sniper rifle's RoF if 1/3, trying to kill someone this way is just a waste.
Don't get me wrong, I can welcome the idea of less random and less lethal Dark Heresy, but I wish they were honest about what is and what isn't possible in this system. If playing a sniper is not a good idea, they should call it out loud in the text, because someone might see the rules and think "hey, I can do it!" and they will be very disappointed indeed.
Also, can someone explain to me how does the Mono upgrade work? It says it gives the weapon a quality of Sapping (X) but it never states what X is.