I came very close to killing Laz'ael during one dialog encounter with an NPC, where I stopped her from a particular action and she berated me as a subordinate who wouldn't follow orders.
The following dialog let me order her to stand down because we were equals and I wasn't her subordinate. But that pissed me off enough that I was tempted to just kill her where she stood, instead of dismissing her from the party back in camp.
Which is probably the kind of thing Larian intended, and that's cool. But not at this stage of the game. Without another front-line melee companion, I didn't really have that option because I needed her in the front line. Maybe when the game opens up with more companions that will be an easier choice.