Here are our list of things that seem broken and need to be fixed or errata'd.
1) Inescapable attack. This feat needs to go away.
2) Dodge and Parry: Should be opposed rolls. We would like to see dodge only work against ranged so that agility doesn't stay the uberstat.
3) Flame: back to DH1 rules, which is death for the person on fire. Once again the only way to survive is to max your agility. Most pcs will have from 3-5 rounds to put out the fire before falling unconcsious and be only able to act normally during one of those rounds. The chance of putting out the fire is about 10-20% each round. The way you treated flame in DH2B1 was much better.
4) Influence: We cannot find a usage limit on the requisition test. BY THE RULES as far as we can tell. If you have a character from the adeptus administratum at the table and are willing to have a subtelty score of 0 during your first adventure, you can equip yourself completely in the FIRST module with all near unique items. Shouldn't these tests be time limited like the commerce tests so that you don't just accept 100 failures to get your 1% success?
5) Shock: Stunning opponents or pcs for long periods with common weapons is bad table management. If shock mauls are really that common, then expect to see npcs with them. Every second time hit with a shock maul is going to result in an average of 3 rounds of stun. This takes the player out of the game for up to 15 - 20 minutes. How is this fun for the player? You need a mechanism that imposes a penalty, but allows the player to do something. Perhaps only half actions (daze in D&D terms)?
6) Fear. You went away from the very nice fear mechanic in DH2B1 and went back to the old DH1 fear mechanic. We are back to the old " I see a dead rabbit and am catatonic with fear for d5 days" stupidity. Please, please go back to the B1 mechanic and break fear down into catagories.
7) Full auto into melee. And can't hit your ally? Really? What kind of uber snipers do you think the pcs are? And if they are that good, why do their stats stink?
8) Auto fire vs. single shots. There needs to be a mechanism to balance single shots versus auto fire. I think it would be reasonable to limit some of the damage adding talents to single shots (crushing blow, mighty shot, etc.) to encourage a little sanity in the combat.
9) Accurate weapons. You need to go back to B1 and make accurate weapons heavy, so that you must brace to get the extra d10. Extra dice are hugely damaging, which is fine with the suprised sniper head shot, but not so realistic when someone is dual wielding two pistol gripped sniper rifles (which is just so wrong on so many levels that I don't have time to list them all). I would go so far as to say that to get the bonus dice, you must do a full round aim, this would fit with "reality" of snipers carefully picking off targets, not fast, but deadly.