A lot of people I think were hoping to see a brilliant refinement of the game on the level of dark heresy or the upcoming rogue trader...instead they've gone 180 degrees away from that to a completely new game mechanics that from my point of view, the only thing I can figure is Descent game mechanics, where its all based on dice.
I really, really, can't begin to tell you how much this turns me off to the idea of buying this game. A lot of people have said they're cautiously optimistic - well, That's not me. At the moment I'm rather Alarmist, and treading close to drearily pessimistic.