Both conversations have a logical impact on her personality, I think. I don't think they were meaningless for her.
I agree on the second conversation, but the first one? Definitely not. How can the decision of someone she has known for literally 10 minutes have any kind of impact on her? I mean, I could have lived with it if you were to be "punished" later on for pushing Leliana to kill the traitor, but getting the same result for staying quiet (rightfully so, because the Inquisitor has no idea what's going on) is just complete and utter BS and horrible writing.
Nevertheless, I agree that more choices should have effected the outcome instead of just two, one of which is totally random.
More of this type of thing, please.
What? More of this type of completely inconsistent and nonsensical writing? Interesting.
What you people seem to be forgetting is that the Inquisitor is NOT the Warden, and you can't assume that everyone who plays DA:I has played Origins in the past, Dragon Age isn't Mass Effect.
I am not someone who is that big into head-canon and/or roleplaying your character but here you are, a person who has just been thrown for a loop, with barely any idea how you got there and completely out of your element - then you see someone "you" don't know, like at all, conversing with one of her agents over something you are completely clueless about. What would be the most sensible thing to do in this type of situation? Asking what's going on or keeping your mouth shut, and since you can't do the former... what definitely isn't sensible is outright interfering without gaining insight of the situation. Not to mention that the cutscene as a whole can be easily missed, which did happen to a lot of players.
Overall it's just the wrong sort of significant choices.