I know people want to see Phryne as this "larger than life superhero" and of course I love that aspect of her too, but I love even more when she is human. When she allows herself to stop her otherwise hectic tempo and reflect and react with emotions to the things happening around her.
This episode is one of those times. She is deeply affected by the death of Yourka and I love to see here. She might not spend so much time reflecting over things and she does not look back towards her past, but she has emotions and she does care about others. She has a lot of empathy and I so very much love her for it.
"It'd be a tactical error to think you had me pegged just yet, Miss Fisher"
~ Jack Robinson, Death at Victoria Dock
Like I said above, Jack still tries to avoid working with Phryne in this episode and he is frustrated that she has constable Hugh Collins totally wrapped around her fingers. But in the end he tells her not to judge him yet, a sign that he is slowly accepting her more and more. He also acknowledge that he is aware of how he has treated her and that he deep down wants her to stick around no matter how ambivalent his feelings are towards her.