I didn't notice any difference they still seem snarky and antagonistic to me? Where did they change them?
Shadowheart has gotten considerably nicer with 'neutral' approval ratings than she was in the previous patch with exceptional approval. She has more things to say and gave the "and not an unpleasant one . . . " talk shortly after meeting her. Which was big change from her previous, guarded personality. Also fewer scowls. Like the OP, I don't think the changes were good and I agree with those asking for longer dialogues. I'd prefer a written wall of text to a brief vo. Again, this is something PoE1 got right.
Welp, i felt like SH was the only one they'd done truly right, what with how her talks progressed and how many they were. Just needed to make her a bit less snappish, on high approval, when asked for her opinion of you and about her magic thing.
Actually, it's actually pretty weird they chose to straight up make them all nicer rather than just working on making the approval system better and more relevant.