She's working through her issues, but she still has a lingering habit of snark as a defense mechanism. She doesn't seem to use it like she did early on in her character development, as a tool to attack and hurt before she gets attacked and hurt though. She seems to use it to test people, if they can put up with her slightly abrasive snark when she's in a good place, they'll be able to handle her when she's in a darker place and relapses into using it in a nasty way.
The other characters of QC all have their own ways of dealing with her, most of them having called her on it by this point
Raven - blunt honesty
Sven - Let her fall when she was drunk and used the 'im just holding on to keep from falling over' line
Angus - Enjoys it
Marten - Endures it
But however they deal with it, they react. Dale is denying her that! He's denying her a reaction to what she has made one of her defining traits. No wonder she's all GRR about it. I can't see Dale having angermanagement issues, so I'm guessing Faye's going to take the next step towards not using snark to test new friends.
