Yeah, the Snow Queen's connection to Emma is certainly intriguing.
I do question if she really is Elsa and Anna's aunt, though she could be and the story she told Elsa about Anna putting her in the urn was done to reflect what happened to her in that their mom put SQ in the urn originally.
And while the townspeople need a major upgrade in character work, they're at least taking sensible steps with most of the major characters, especially Hook and Emma, since it completely makes sense she would feel that way if she really cared about Hook.
And it was great to see Hans get put down and that he's not the cause of Elsa getting put away because he's such a jerk.