Real Emma and Snow have always been my favorite. I am not sure if i am going to be able to watch this show without Emma. They are going to have to introduce more female characters. An all male cast with just Regina is going to be really hard for me to watch. Maybe Lucy’s mother will be an interesting character.
I think Emma and her parents storyline has never been properly shown. They have never gone enough into Emma’s back story growing up. Emma has barely discussed that with her parents. They have never properly resolved that for me. They just quit talking about it. Snow and Charming as a couple may be finished, but Emma and her parents was barely touched, in my opinion, and not even remotely delved into as deeply as it should have been. Because it was never explored properly, it was never resolved, and that is complete failure for a show where Emma is the main character.
I actually think that Zelena’s story felt finished. She was a minor character and she resolved her issues with Regina. Those were the issues her story revolved around. Her magic is gone, so she is no longer a danger and she has her family. They could do more with her, but it would be opening new storylines.
Emma’s storyline with her parents was opened in Season 1, but never properly explored or resolved, so that feels much less finished then Zelena who had very few storylines being a much more minor character.