My players and I are wondering about the core rules for roleplaying in the Warhammer 40,000 universe and how they seem not to get better as more books are being released.
Take for example the Unnatural Characteristic trait in Rogue Trader, which works differently/was changed from the one in Dark Heresy. Progressive insight and a finetuning of the rules system, one would say. But then in the third setting to come out, Deathwatch, we're back to the rules from Dark Heresy. Enter Black Crusade and we have yet another version of the rules for Unnatural Characteristics.
Take Awareness. Halfway in Dark Heresy the designers must have realized this skill was largely superfluous and not different enough from basic Perception ... and that anyone not having this skill tests at half Perc, per the RAW. An undesireable consequence, so they (FFG or Black Industries, dunno) came up with a clumsy fix in the Inquisitor's Handbook: with Awareness you can lower the difficulty of the Perc test. This works completey different than all other skills, a solution that is alien to the system. It should have been a Talent. Anyways, out comes Rogue Trader, and then Deathwatch, and Awareness appears with the quick fix from the Inquisitor's Handbook ignored again!
Autofire also works differently in Black Crusade from all the earlier games, which differed amongst each other in this rule too.
And I've never quite reconciled myself with the fact that Daemonettes, Orks, bolters and krak grenades in Deathwatch are different rules-wise than they are in for example Dark Heresy.
I know that some settings might require different rules and/or different emphasis. But that's not what seems to be the case here.
My point: is FFG really finetuning the core system of rules, combing out things that don't work and making well-thought out changes for the better, or is it just 'anything goes' with whatever new core book is released?