Excellent questions!
A) Correct, the Devils Bargain you take when Embracing a Quirk provides the +1d.
B) Correct again, if no Trait fits the Resist action it cannot be leveraged, but you might have to pay using a Trait based on the roll. We wanted to make sure that you can attempt to Resist even if it means there is a high chance you’ll be Taken Out. If you can get the +1d you should (almost) always try to make an argument for how you are bringing it into play.
C) Harm (minor and major) still matter in the fiction even if there isn’t a penalty levied (the way they are in most FitD games). I would say that every player should be challenging themselves to take their Harm into account when declaring their Actions and for the Lore Weaver to do the same when adjudicating each Action.
I look forward to hearing about your games. Please feel free to join us on Discord as well if you have any questions that need a speedier response.
-Gavin