I've both Gm'ed and played DH for some time now and one thing that really bugs me about this game is how unskilled the players are when it comes to skills. An average PC will have Perception 30. If said Pc don't have the awareness skill, he's stuck with a 15% chance of spotting something. Situational modifiers help of course, but I can't help but feel that DH have handle the skill system poorly.
So I propose a houserule to help remedy the situation a little.
Instead of halving the stat value when atempting to use a basic skill your character don't possess, give -10% modifier instead.